DEVICE AND METHOD FOR CONTROLLING A SHOVEL-BUCKET DOOR

Abstract

A device and method which implements a preferred embodiment of the present invention includes a means for controlling the door of a shovel bucket. In one embodiment, an adjustable connecting rod may be configured to pivotally connect to a shovel bucket. A fixed connecting rod may be configured to pivotally connect to the adjustable connecting rod and pivotally connect to the door of the shovel bucket. The proximal end of the adjustable connecting rod may move in a direction towards the shovel bucket when the door is closing in order to lock the door. An eccentric assembly may be configured to move the proximal end of the adjustable connecting rod in a direction away from the shovel bucket after the door has closed in order to unlock the door.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

This non-provisional application claims priority based upon prior U.S. Provisional Patent Application Ser. No. 61/370,256 filed Aug. 3, 2010 in the name of Alberto Opazo, entitled “Control Device for Shovel-Bucket Door,” the disclosure of which is incorporated herein by reference.

BACKGROUND OF THE INVENTION

The present invention relates generally to shovel buckets and, more particularly, to the control of shovel-bucket doors.

Shovel and loading equipment buckets (collectively, “shovel buckets”) are frequently used in the construction and mining industries in aggressive mining or earth movement operations. Shovel buckets often have a cover or door that is hinged to the shovel bucket. Shovel buckets also traditionally include a cable and latch system to open and close the door. Tension in the cable can be mechanically or electro-mechanically managed to remotely open and close the door. For example, the latch may keep the door locked in a closed position until the cable is used to open the latch and allow the door to swing open. When the door swings closed, the cable can also be used to close the latch so that the door is locked in a closed position.

Shovel buckets have cycle times between load dumping that may vary depending on factors such as the swing angle of the shovel bucket as it scoops up load material and swings to a location where it will unload the load material, the weight of the load material in the shovel bucket, and operator skill. The longest percentage of time in the cycle is swinging time.

Even with the use of cable and latch systems, shovel-bucket doors are frequently exposed to intense banging and slamming due, in part, to the weight of the door. Such intense banging and slamming can increase wear and lead to premature failure of a shovel bucket, its door, and its other components. For example, the door may become misaligned with the shovel bucket and wear plates on the shovel bucket or door may be damaged or cracked, each requiring service or readjustment and costly equipment downtime. Likewise, the cable may suffer damage from the intense banging and slamming of the door and, as a result, may need to be serviced or replaced.

Consequently, there is a significant need for a device and method that will improve shovel-bucket door performance, reduce shovel bucket down time, and reduce the impact and blows of the door against the shovel bucket. There is also a significant need for a device and method that will provide a mechanical advantage for the input force needed to open and close the door in view of the weight of the material in the shovel bucket and the inertial effects of the door. There is also a significant need for a device and method that will yield minimal output torque and dampen loads due to the inertial effects of the door opening and closing. The present invention provides these and other advantages, as will be apparent from the following detailed description and accompanying figures.

SUMMARY OF THE INVENTION

A device and method which implements a preferred embodiment of the present invention includes a means for controlling the door of a shovel bucket. In one embodiment, an adjustable connecting rod may be configured to connect to a shovel bucket and a fixed connecting rod may be configured to connect to the adjustable connecting rod and the door of the shovel bucket. The angle between the fixed connecting rod and the distance between the pivot point of the distal end of the fixed connecting rod and the pivot point of the distal end of the adjustable connecting rod may be greater than zero when said door is closed.

In one embodiment, an adjustable connecting rod may be configured to pivotally connect to a shovel bucket. A fixed connecting rod may be configured to pivotally connect to the adjustable connecting rod and pivotally connect to the door of the shovel bucket. The proximal end of the adjustable connecting rod may move in a direction towards the shovel bucket when the door is closing. An eccentric assembly may be configured to move the proximal end of the adjustable connecting rod in a direction away from the shovel bucket after the door has closed.

In one embodiment, the door of a shovel bucket may be controlled by first positioning the shovel bucket such that gravity will allow the door to swing to a closed position and the proximal end of a fixed connecting rod will rest against an eccentric base support. The proximal end of an adjustable connecting rod may then be moved a predetermined distance away from said shovel bucket after said door is in a closed position. The proximal end of the adjustable connecting rod may be pivotally connected to the proximal end of the fixed connecting rod, the distal end of the adjustable connecting rod may be pivotally connected to the shovel bucket, and the distal end of the fixed connecting rod may be pivotally connected to the door. The shovel bucket may then be positioned such that gravity will allow said door to swing open.

BRIEF DESCRIPTION OF THE DRAWINGS

Before drawings are presented it is to be understood that the invention is not limited to the details of the assembly and arrangements of the components set forth in the following description or illustrated in the drawings. The invention is capable of its major components being carried out and assembled in various ways. For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions, taken in conjunction with the accompanying drawings but not limited to represent the whole invention, in which:

FIG. 1 shows an isometric view of a shovel bucket that includes one embodiment of the present invention.

FIG. 2 shows a side view of a shovel bucket that includes one embodiment of the present invention.

FIG. 3 shows an isometric view of a shovel bucket that includes one embodiment of the present invention with one fixed connecting rod removed.

FIG. 4 shows a detailed view of the proximal end of an adjustable connecting rod suspended just above an eccentric base support in one embodiment of the present invention.

FIG. 5 shows an isometric view of an eccentric assembly in one embodiment of the present invention.

FIG. 6 shows an isometric view of an adjustable connecting rod in one embodiment of the present invention.

FIG. 7 shows an isometric view of an eccentric base support in one embodiment of the present invention.

FIG. 8 shows an isometric view of a door mount assembly in one embodiment of the present invention.

FIG. 9 shows a side view of one embodiment of the present invention and a shovel bucket with a door in a closed position.

FIG. 10 shows a side view of one embodiment of the present invention and a shovel bucket with a door in a slightly open position.

FIG. 11 shows a side view of one embodiment of the present invention and a shovel bucket with a door in an open position.

FIG. 12 shows a side view of one embodiment of the present invention and a shovel bucket with a door in a fully open position.

DETAILED DESCRIPTION

Reference is now made to FIG. 1 which shows an isometric view of a shovel bucket 100 in one embodiment of the present invention. In this embodiment, the shovel bucket 100 includes a door 102 on the posterior 100d of the shovel bucket 100 and an opening (not shown) on the anterior 100e of the shovel bucket 100. The shovel bucket 100 also includes for purposes of illustration, a top side 100a, a right side 100b, and a left side 100c. The proximal end of the door 102 is shown to be pivotally connected to two door mount assemblies 103. Each of the two door mount assemblies 103 may be configured to connect to the door 102, the shovel 100, and a fixed connecting rod 101. One door mount assembly 103 may be connected to the shovel 100 on the top side 100a of the shovel 100 generally near the right-posterior corner of the top side 100a and one door mount assembly 103 may be connected to the shovel 100 on the top side 100a of the shovel 100 generally near the left-posterior of the top side 100a. The shovel bucket 100 may include a mount 109 that may be configured to connect to the door mount assembly 103.

The distal end 101a of each of the fixed connecting rods 101 is shown to be pivotally connected to one of the door mount assemblies 103 and the proximal end 101b of each of the fixed connecting rods 101 is shown to be pivotally connected to the proximal end 105b of an adjustable connecting rod 105. The proximal end 101b of each of the fixed connecting rods 101 is also shown to be positioned above an eccentric base support 107. One eccentric base support 107 may be connected to the top side 100a of the shovel 100, in a position generally flush with or slightly offset from the right side 100b of the shovel 100 and one eccentric base support 107 may be connected to the top side 100a of the shovel 100, in a position generally flush with or slightly offset from the left side 100c of the shovel 100. The proximal end 105b of the adjustable connecting rod 105 is also shown to be positioned above the eccentric base support 107.

The distal end 105a of each of the adjustable connecting rods 105 may pivotally connect to a fixed shovel support 106 which may be part of the shovel bucket 100 or an addition connected to the shovel bucket 100. One fixed shovel support 106 may be connected to the top side 100a of the shovel 100, in a position generally flush with or slightly offset from the right side 100b and near the anterior 100e of the shovel 100 and one fixed shovel support 106 may be connected to the top side 100a of the shovel 100, in a position generally flush with or slightly offset from the left side 100c and near the anterior 100e of the shovel 100.

An eccentric assembly 104 is shown to connect to each of the eccentric base supports 107. The length of the eccentric assembly is generally parallel to the posterior 100d and anterior 100e of the shovel bucket 100 and generally perpendicular to the right side 100b and left side 100c of the shovel bucket 100. The eccentric assembly 104 may also include a moment arm 108. In this embodiment, the moment arm 108 is comprised of two moment aim plates 108a and 108b. As will be described in more detail below, movement of the moment arm 108 in a clockwise direction may cause the eccentric assembly 104 to apply an upward force on the proximal ends 105b of the adjustable connecting rods 105 and, thereby, cause the proximal ends 105b of the adjustable connecting rods 105 and the proximal ends 101b of the fixed connecting rods 101 to move upward so that the door 102 may open from a closed position.

Reference is now made to FIG. 2 which shows a side view of a shovel bucket 100 that includes one embodiment of the present invention. In this embodiment, the door 102 is in a closed position and rests against the posterior 100d of the shovel bucket 100. The door mount assembly 103 is connected to the proximal end 102a of the door 102, the shovel bucket 100, and the distal end 101a of a fixed connecting rod 101. The proximal end 101b of the fixed connecting rod 101 is shown to be pivotally connected to the proximal end 105b of an adjustable connecting rod 105. The distal end 105a of the adjustable connecting rod 105 is shown to be pivotally connected to the fixed shovel support 106. The proximal end 101b of the fixed connecting rod 101 may rest on an eccentric base support 107 when the door 102 is in a closed position. An eccentric end cap on one end of the eccentric assembly 104 is shown to connect to the eccentric base support 107.

In one embodiment, the door 102, the fixed connecting rod 101, and the adjustable connecting rod 105 can be viewed as a mechanism that can be adjusted to lock the door 102 and prevent undesired locking and jamming of the door 102. For purposes of illustration, the distance 204 between the pivot point 201 of the distal end 101a of the fixed connecting rod 101 and the pivot point 202 of the proximal end 101b of the fixed connecting rod 101, the distance 205 between the pivot point 202 of the proximal end 101b of the fixed connecting rod 101 and the pivot point 203 of the distal end 105a of the adjustable connecting rod 105, and the distance 206 between the pivot point 201 and the pivot point 203 can comprise a triangle 207. In one embodiment, the lock angle θ that is formed by the intersection of distance 204 and distance 206 of the triangle 207 is greater than zero but less than or equal to 1.5 degrees when the door 102 is closed. In one embodiment, the lock angle θ is approximately equal to 1.5 degrees when the door 102 is closed. In one embodiment, the magnitude of the lock angle θ when the door is closed can be adjusted by the adjusting height of the eccentric base support 107 and/or the length of the adjustable connecting rod 105. In one embodiment, the distance 206 is approximately 2,146 millimeters when the door 102 is closed. In one embodiment, the distance 205 may be adjusted to a value between 813 millimeters and 850 millimeters. Stated differently, in one embodiment, the length of each adjustable connecting rod 105 may be adjusted within a variance of approximately 37 millimeters. In one embodiment, the distance 205 may be varied by adjusting the length of the adjustable connecting rods 105. In one embodiment, when the door 102 is closed, the shortest distance 208 between point 202 and the distance 206 is equal to a value between approximately 10 millimeters and approximately 20 millimeters.

Reference is now made to FIG. 3 which shows an isometric view of a shovel bucket 100 that includes one embodiment of the present invention with one fixed connecting rod 105 removed. In this embodiment, the fixed connecting rod 101 on the right side of the shovel bucket 105 has been removed. As a result, the proximal end 105b of the adjustable connecting rod 105 is visible suspended just above the eccentric base plate 107. The portion of the proximal end 105b of the adjustable connecting rod 105 encircled by circle 303 is shown in more detail in FIG. 4.

Reference is now made to FIG. 4 which shows a detailed view of the proximal end 105b of an adjustable connecting rod 105 suspended just above an eccentric base support 107 in one embodiment of the present invention. In this embodiment, the adjustable connecting rod 105 is shown to have a wear plate 403 along the bottom of outside surface of the proximal end 105b of the adjustable connecting rod 105. When the door 102 (not shown) is in a closed position, the proximal end 101b of the fixed connecting rod 101 may rest against the stops 404 of the eccentric base support 107. In other embodiments, when the door 102 is in a closed position, the proximal end 105b of the adjustable connecting rod 105 may rest against the stops 404 of the eccentric base support 107. To open the door, the eccentric guide 406 may rotate upward so that the eccentric roll-wear plate 405 applies an upward force 407 on the wear plate 403 and pushes the proximal end 105b of the adjustable connecting rod 105 upward. In one embodiment, the wear plate 403 may be made of material that is more resistant to wear and damage than the material comprising the rest of the adjustable connecting rod 105. In addition, by limiting contact of the eccentric roll-wear plate 405 to the wear plate 403 of the adjustable connecting rod 105 (as opposed to the body of the proximal end 105b of the adjustable connecting rod 105), wear and damage resulting from repeated contact with the eccentric roll-wear plate 405 will generally be limited to wear plate 403. As a result, an operator may be able to change out a worn wear plate 403 rather than removing an entire adjustable connecting rod 105.

In one embodiment, the adjustable connecting rod 105 includes a second wear plate 402 on the top side of the outer surface of the proximal end 105b of the adjustable connecting rod 105. As a result, when the wear plate 403 is worn, an operator may simply rotate the proximal end 105b of the adjustable connecting rod 105 (or, alternatively, rotate the entire adjustable connecting rod 105) one hundred eighty degrees so that the eccentric roll-wear plate 405 will contact wear plate 402 in order to open the door 102 from a closed position. In one embodiment, the proximal end 105b of the adjustable connecting rod 105 may include a lubrication port 401.

Reference is now made to FIG. 5 which shows an isometric view of an eccentric assembly 104 in one embodiment of the present invention. In this embodiment, the eccentric assembly includes a main tube 505 with an eccentric end cap 209 at each end of the main tube 505. The eccentric assembly 104 may also include an eccentric guide 406 located near each end of the main tube 505. In this embodiment, each of eccentric guide 406 is positioned equidistant from the center of the main tube 505 and the angular position of each eccentric guide 406 about the main tube 505 is approximately equivalent. Each eccentric guide 406 may include two eccentric guide plates 501 and an eccentric roll-wear plate 405. In this embodiment, the proximal ends 501b of the eccentric guide plates 501 may slide onto, and be securely fastened to, the main tube 505. The distal ends 501a of the eccentric guide plates 501 may connect to the eccentric roll-wear plate 405. In this embodiment, the eccentric roll-wear plate 405 is wheel-shaped and is configured to connect between the distal ends 501a of two eccentric guide plates 501.

The eccentric assembly 104 may also include a moment arm 108. In this embodiment, the moment arm 108 includes the moment arm plates 108a and 108b which are connected by moment rod 506. In this embodiment, the angular position of the moment arm 108 about the main tube 505 relative to the angular position of the eccentric guides 406 about the main tube 505 is adjusted so that when a force is applied to the moment arm 108 that causes the main tube 505 to rotate in a clockwise direction the eccentric guides 406 will also rotate clockwise and the eccentric roll-wear plates 405 will apply an upward force 407 on the wear plate 403 of the adjustable connecting rod 105. It can be appreciated that other embodiments of the present invention may include other mechanisms for rotating the eccentric assembly 104 and/or the eccentric guides 406 without departing from the spirit and scope of the invention.

Reference is now made to FIG. 6 which shows an isometric view of an adjustable connecting rod 105 in one embodiment of the present invention. In this embodiment, the proximal end 105b and the distal end 105a of the adjustable connecting rod 105 are identical in shape so that either of the two ends of the adjustable connecting rod 105 may be used to connect to the proximal end 101b of the fixed connecting rod 101 and either of the two ends of the adjustable connecting rod 105 may be used to connect to the fixed shovel support 106. For example, the adjustable connecting rod 105 may include wear plates 403 on its proximal end 105b and its distal end 105a so that the direction of the adjustable connecting rod 105 is interchangeable.

In one embodiment, the distal end 105a of the adjustable connecting rod 105 may contain one of either right hand or left hand threads that may be screwed into the nut adjustable 604 and the proximal end 105b of the adjustable connecting rod 604 may contain the other of either right hand or left hand threads that may be screwed into the nut adjustable 604. The length of the adjustable connecting rod 105 may be varied by screwing in or screwing out the distal end 105a and/or the proximal end 105b of the adjustable connecting rod until the adjustable connecting rod 105 is at a desired length. Once the adjustable connecting rod 105 is at a desired length, the lock pins 601 may be secured into a receptacle 605 of the locking-pin assembly 602. In this embodiment, a locking-pin assembly 602 is configured to fasten around the diameter of each end of the nut adjustable 604.

The proximal end 105b of the adjustable connecting rod 105 is shown to include a lubrication port 401. The lubrication port 401 may be used to lubricate the rod end bushing 603 to assist movement of the proximal end 101b of the adjustable connecting rod 105 and the proximal end 105b of the adjustable connecting rod 105. Although not shown in FIG. 6, the distal end 105a of the adjustable connecting rod 105 may also include a lubrication port 401.

Reference is now made to FIG. 7 which shows an isometric view of an eccentric base support 107 in one embodiment of the present invention. The eccentric base support 107 may include a base plate 702, an external lateral support 701, an eccentric internal support 703, steel liners 705, rubber liners 706, and stops 404. The external lateral support 701 and eccentric internal support 703 may extend from or be mounted to the base plate 702. In one embodiment, the external lateral support 701 and the eccentric internal support 703 are positioned perpendicular to the base plate 702 and parallel to each other. In one embodiment, the distance between the external lateral support 701 and the eccentric internal support 703 is proportional to the width of the proximal end 105b of the adjustable connecting rod 105. The external lateral support 701 and the eccentric internal support 703 may also be aligned such that the aperture 708 in the external lateral support 701 aligns with the tube slot 707 in the eccentric internal support 703. In this configuration, the main tube 505 of the eccentric assembly 104 may extend through the aperture 708 such that the eccentric end cap 209 may connect to end of the main tube 505 on the external side 709 of the external lateral support 701. The main tube 505 may also pass through and/or be supported by the tube slot 707. The eccentric guides 406 may be positioned along the main tube 505 between the external lateral support 701 and the eccentric internal support 703.

In one embodiment, a stop 404a may be attached to the guide 704a at the top of the external lateral support 701 and a stop 404b may be attached to the guide 704b at the top of the eccentric internal support 703. In one embodiment, the stops 404 may have concave surfaces that fit the shape of the proximal end 101 b of the fixed connecting rod 101 or the proximal end 105b of the adjustable connecting rod 105. In one embodiment, steel liners 705 and rubber liners 706 may be positioned between the stops 404 and the guides 705. In one embodiment, a single steel liner 705 may underlie a single rubber liner 706. In this configuration, for example, the steel liner 705 may structurally support the rubber liner 706 and provide structural support for fastening the stop 404, the steel liner 705, and the rubber liner 706 to the guide 704. In addition, the rubber liner 706 may absorb the impact of, and dampen the movement of, the proximal end 105a of the adjustable connecting rod 105 when it strikes the stop 404. In one embodiment, the stop 404, the steel liner 705, and the rubber liner 706 may be bolted to the guide 704. However, it can be appreciated that other embodiments of the present invention may include other mechanisms for fastening the stop 404, the steel liner 705, and the rubber liner 706 to the guide 704 without departing from the spirit and scope of the invention.

Reference is now made to FIG. 8 which shows an isometric view of a door mount assembly 103 in one embodiment of the present invention. The door mount assembly may include a top mounting washer 802, an external wing support 803, and internal wing support 801, an external wing support 806, a wing base support 804, and a lower mounting washer 805. In one embodiment, the shape of the wing base support 804 may be curved. For example, the shape of the wing base support 804 may be curved to reduce the risk of the formation of large stress concentration fractures under high loads, such as those created by movement of the door 102. The wing base support 804 may also include the lower mounting washer 805. The lower mounting washer 805 may be configured to connect to the distal end 101a of the fixed connecting rod 101.

The internal wing support 801 and the external wing support 806 may be configured to connect to the proximal end 102a of the door 102 such that the external wing support 806 connects to the outer surface (the surface facing away from the shovel bucket) of the door 102 and the internal wing support 801 connects to the inner surface (the surface facing the shovel bucket) of the door 102. The top mounting washer 802 may connect to the shovel bucket at the mount 109. In one embodiment, the external wing support 806 may curve 803 and extend to or near the top mounting washer 802 to improve the structural strength of the door mount assembly 103 when mounted to the door 102. For example, the curve 803 of the external wing support 806 may provided additional welding area for connecting the proximal end 102a of the door 102 to the door mount assembly 103.

Reference is now made to FIG. 9 which shows a side view of one embodiment of the present invention and a shovel bucket 100 with a door 102 in a closed position. In this embodiment, the lock angle θ is greater than zero and the fixed connecting rod 101 and the adjustable connecting rod 105 prevent the door from opening. In this configuration the shovel bucket 100 is in a digging state.

Reference is now made to FIG. 10 which shows a side view of one embodiment of the present invention and a shovel bucket 100 with a door 102 in a slightly open position. In this embodiment, the eccentric roll wear plate 405 has applied an upward force on the wear plate 403 of proximal end 105b of the adjustable connecting rod 105. As a result, the proximal end 105b of the adjustable connecting rod 105 and the proximal end 101b of the fixed connecting rod 101 has moved upwards (or away from the shovel bucket 100). As a result, the pivot point 201 of the distal end 101a of the fixed connecting rod 101 has moved slightly closer to the pivot point 203 of the distal end 105a of the adjustable connecting rod 105 and the door 102 has slightly opened. In addition, the lock angle θ is now slightly negative because the pivot point 202 at the proximal end 101b of the fixed connecting rod 101 has moved above the distance between pivot point 201 and pivot point 203. With pivot point 202 in this position, the door 102 would swing open if the shovel bucket 100 were to move to cause the door 102 to open, such as by rotating counter clockwise. On the other hand, if the eccentric roll wear plate 405 were to cease to apply an upward force on the wear plate 403 of the proximal end 105b of the adjustable connecting rod 105 while the shovel bucket 100 is positioned upright (i.e., the plane of the top of the shovel bucket 100 is perpendicular to the gravitational field), the proximal end 105b of the adjustable connecting rod 105 will move towards the shovel bucket 100 until the proximal end 101b of the fixed connecting rod 101 strikes the stop 404 of the eccentric base support 107 and the door 102 would again be locked in a closed position.

Reference is now made to FIG. 11 which shows a side view of one embodiment of the present invention and a shovel bucket 100 with a door 102 in an open position. In this embodiment, as the shovel bucket 100 has rotated counter clockwise, the door 100 has continued to open and the pivot point 201 at the distal end 101a of the fixed connecting rod 101 has moved even closer than in FIG. 10 to the pivot point 203 at the distal end 105a of the adjustable connecting rod 105. In addition, the lock angle θ is now more negative than in FIG. 10 and the pivot point 202 has moved even farther above the distance between pivot point 201 and pivot point 203.

Reference is now made to FIG. 12 which shows a side view of one embodiment of the present invention and a shovel bucket 100 with a door 102 in a fully open position. In this embodiment, the shovel bucket 100 has continued to rotate counter clockwise such that posterior 100d of the shovel bucket 100 is generally parallel to the ground (or, more particularly, perpendicular to the field of gravity) such that the door 102 has swung fully open and the pivot point 201 at the distal end 101a of the fixed connecting rod 101 has moved even closer than in FIG. 11 to the pivot point 203 at the distal end 105a of the adjustable connecting rod 105. In addition, the lock angle θ is now more negative than in FIG. 11 and the pivot point 202 has moved even farther above the distance between pivot point 201 and pivot point 203.

When a single embodiment is described herein, it will be readily apparent that more than one embodiment may be used in place of a single embodiment. Similarly, where more than one embodiment is described herein, it will be readily apparent that a single embodiment may be substituted for that one device.

In light of the wide variety of possible devices and methods, the detailed embodiments are intended to be illustrative only and should not be taken as limiting the scope of the invention. Rather, what is claimed as the invention is all such modifications as may come within the spirit and scope of the following claims and equivalents thereto.

None of the description in this specification should be read as implying that any particular element, step or function is an essential element which must be included in the claim scope. The scope of the patented subject matter is defined only by the allowed claims and their equivalents. Unless explicitly recited, other aspects of the present invention as described in this specification do not limit the scope of the claims.

Claims

1. A control device comprising:

an adjustable connecting rod configured to connect to a shovel bucket; and

a fixed connecting rod configured to connect to said adjustable connecting rod and the door of said shovel bucket such that the angle created by said fixed connecting rod and the distance between the pivot point of the distal end of said fixed connecting rod and the pivot point of the distal end of said adjustable connecting rod is greater than or equal to zero when said door is closed.

2. The device of claim 1 wherein said adjustable connecting rod is configured to connect to said shovel bucket such that said adjustable connecting rod may pivot relative to said shovel bucket, said fixed connecting rod is configured to connect to said adjustable connecting rod such that said fixed connecting rod and said adjustable connecting rod may each pivot, and said fixed connecting rod is configured to connect to said door such that said fixed connecting rod and said door may each pivot.

3. The device of claim 1 wherein said distal end of said adjustable connecting rod is identical in shape to the proximal end of said adjustable connecting rod.

4. The device of claim 1 wherein said distal end of said adjustable connecting rod is identical in shape to the proximal end of said adjustable connecting rod except that one of said proximal end or said distal end includes reverse threads.

5. The device of claim 1 wherein said distal end of said adjustable connecting rod is configured to connect to either of said shovel bucket or said fixed connecting rod and the proximal end of said adjustable connecting rod is configured to connect to either of said shovel bucket or said fixed connecting rod.

6. The device of claim 1 wherein the length of said adjustable connecting rod may be adjusted by screwing or unscrewing the proximal end of said adjustable connecting rod and/or said distal end of said adjustable connecting rod into or from a nut adjustable of said adjustable connecting rod.

7. The device of claim 1 wherein said adjustable connecting rod includes at least one lock pin connected to a portion of the proximal end or said distal end of said adjustable connecting rod and at least one lock pin assembly connected to a nut adjustable of said adjustable connecting rod.

8. The device of claim 1 wherein the distance between the pivot point of said proximal end of said adjustable connecting rod and said pivot point of said distal end of said adjustable connecting rod is within the range of 83 millimeters and 850 millimeters.

9. The device of claim 1 wherein the length of said adjustable connecting rod may be adjusted such that the distance between the pivot point of the proximal end said adjustable connecting rod and the pivot point of said distal end of said adjustable connecting rod is within the range of 813 millimeters and 850 millimeters,

10. The device of claim 1 wherein said adjustable connecting rod includes at least one wear plate.

11. The device of claim 1 further comprising an eccentric base support configured to stop motion of the proximal end of said fixed connecting rod towards said shovel bucket.

12. The device of claim 1 further comprising an eccentric base support configured to support the proximal end of said fixed connecting rod and/or the proximal end of said adjustable connecting rod.

13. The device of claim 1 further comprising an eccentric base support configured to support the proximal end of said fixed connecting rod and/or the proximal end of said adjustable connecting rod and including at least one of: a guide, a steal liner, a rubber liner, and a stop.

14. The device of claim 1 further comprising an eccentric base support configured to support an eccentric assembly such that rotation of said eccentric assembly will allow an eccentric roll-wear plate connected to said eccentric assembly to contact the proximal end of said adjustable connecting rod.

15. The device of claim 1 further comprising an eccentric assembly configured to apply a force to the proximal end of said adjustable connecting rod, said force being directed away from said shovel bucket.

16. The device of claim 1 further comprising an eccentric assembly configured to move the pivot point of the proximal end of said adjustable connecting rod in a direction away from said shovel bucket.

17. The device of claim 1 wherein the proximal end of said adjustable connecting rod is configured to move in a direction away from said shovel bucket when an eccentric assembly connected to said shovel bucket is rotated.

18. The device of claim 1 wherein said fixed connecting rod is configured to connect to said door by connecting to a door mount assembly that is configured to connect to said fixed connecting rod, said shovel bucket, and said door.

19. The device of claim 1 wherein the proximal end of said fixed connecting rod is further configured to fall against an eccentric base support when said door is closing.

20. The device of claim 1 wherein said door will not open from a closed position unless the proximal end of said adjustable connecting rod is moved a distance of at least 10 millimeters away from said shovel bucket.

21. The device of claim 1 wherein said door will only begin to open from a closed position after the proximal end of said adjustable connecting rod has moved away from said shovel bucket a distance in the range of 10 millimeters to 20 millimeters.

22. The device of claim 1 wherein said angle is greater than or equal to zero but less than or equal to 1.5 degrees when said door is closed.

23. The device of claim 1 wherein said angle is approximately 1.5 degrees when said door is closed.

24. The device of claim 1 wherein said angle is less than zero when said door is open.

25. The device of claim 1 wherein said distance between said pivot point of the distal end of said fixed connecting rod and said pivot point of said distal end of said adjustable connecting rod is approximately 2,146 millimeters when said door is closed.

26. A control device comprising:

an adjustable connecting rod configured to pivotally connect to a shovel bucket; and

a fixed connecting rod configured to pivotally connect to said adjustable connecting rod and pivotally connect to the door of said shovel bucket such that the proximal end of said adjustable connecting rod will move in a direction towards said shovel bucket when said door is closing; and

an eccentric assembly configured to move the proximal end of said adjustable connecting rod in a direction away from said shovel bucket after said door has closed.

27. The device of claim 26 wherein said proximal end of said adjustable connecting rod is identical in shape to the distal end of said adjustable connecting rod.

28. The device of claim 26 wherein said proximal end of said adjustable connecting rod is identical in shape to the distal end of said adjustable connecting rod except that one of said proximal end or said distal end includes reverse threads.

29. The device of claim 26 wherein the distal end of said adjustable connecting rod is configured to connect to either of said shovel bucket or said fixed connecting rod and said proximal end of said adjustable connecting rod is configured to connect to either of said shovel bucket or said fixed connecting rod.

30. The device of claim 26 wherein the length of said adjustable connecting rod may be adjusted by screwing or unscrewing said proximal end of said adjustable connecting rod and/or the distal end of said adjustable connecting rod into or from a nut adjustable of said adjustable connecting rod.

31. The device of claim 26 wherein said adjustable connecting rod includes at least one lock pin connected to a portion of said proximal end or said distal end of said adjustable connecting rod and at least one lock pin assembly connected to a nut adjustable of said adjustable connecting rod.

32. The device of claim 26 wherein the distance between the pivot point of said proximal end of said adjustable connecting rod and the pivot point of said distal end of said adjustable connecting rod is within the range of 813 millimeters and 850 millimeters.

33. The device of claim 26 wherein the length of said adjustable connecting rod may be adjusted such that the distance between the pivot point of said proximal end of said adjustable connecting rod and the pivot point of distal end of said adjustable connecting rod is within the range of 813 millimeters and 850 millimeters.

34. The device of claim 26 wherein said adjustable connecting rod includes at least one wear plate.

35. The device of claim 26 further comprising an eccentric base support configured to stop motion of said proximal end of said fixed connecting rod towards said shovel bucket.

36. The device of claim 26 further comprising an eccentric base support configured to support the proximal end of said fixed connecting rod and/or said proximal end of said adjustable connecting rod.

37. The device of claim 26 further comprising an eccentric base support that is configured to support the proximal end of said fixed connecting rod and/or the proximal end of said adjustable connecting rod and includes at least one of: a guide, a steal liner, a rubber liner, and a stop.

38. The device of claim 26 further comprising an eccentric base support configured to support said eccentric assembly such that rotation of said eccentric assembly will allow an eccentric roll-wear plate connected to said eccentric assembly to contact said proximal end of said adjustable connecting rod.

39. The device of claim 26 wherein said eccentric assembly is configured to move said proximal end of said adjustable connecting rod by applying a force to said proximal end of said adjustable connecting rod, said force being directed away from said shovel bucket.

40. The device of claim 26 wherein said eccentric assembly is configured to rotate such that an eccentric roll-wear plate connected to said eccentric assembly will contact said proximal end of said adjustable connecting rod.

41. The device of claim 26 wherein said fixed connecting rod is configured to connect to said door by connecting to a door mount assembly that is configured to connect to said fixed connecting rod, said shovel bucket, and said door.

42. The device of claim 26 wherein the proximal end of said fixed connecting rod is further configured to fall against an eccentric base support when said door is closed.

43. The device of claim 26 wherein said door will not open from a closed position unless said proximal end of said adjustable connecting rod is moved a distance of at least 10 millimeters away from said shovel bucket.

44. The device of claim 26 wherein said eccentric assembly must move said proximal end of said adjustable connecting rod away from said shovel bucket a distance of between 10 millimeters and 20 millimeters for said door to open from a closed position.

45. The device of claim 26 wherein said door will only begin to open from a closed position after said proximal end of said adjustable connecting rod has moved away from said shovel bucket a distance in the range of 10 millimeters to 20 millimeters.

46. The device of claim 26 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is greater than or equal to zero when said door is closed.

47. The device of claim 26 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod to said door and the pivot point of said distal end of said adjustable connecting rod is greater than or equal to zero but less than or equal to 1.5 degrees when said door is closed.

48. The device of claim 26 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is approximately 1.5 degrees when said door is closed.

49. The device of claim 26 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is less than zero when said door is open.

50. The device of claim 26 wherein said distance between said pivot point of said distal end of said fixed connecting rod and said pivot point of said distal end of said adjustable connecting rod is approximately 2,146 millimeters when said door is closed.

51. A method for controlling the door of a shovel bucket comprising:

positioning said shovel bucket such that gravity will allow said door to swing to a closed position and the proximal end of a fixed connecting rod will rest against an eccentric base support;

moving the proximal end of an adjustable connecting rod a predetermined distance away from said shovel bucket after said door is in a closed position, said proximal end of said adjustable connecting rod being pivotally connected to said proximal end of said fixed connecting rod, the distal end of said adjustable connecting rod being pivotally connected to said shovel bucket, and the distal end of said fixed connecting rod being pivotally connected to said door; and

positioning said shovel bucket such that gravity will allow said door to swing open.

52. The method of claim 51 wherein said proximal end of said adjustable connecting rod is identical in shape to said distal end of said adjustable connecting rod.

53. The method of claim 51 wherein said proximal end of said adjustable connecting rod is identical in shape to said distal end of said adjustable connecting rod except that one of said proximal end or said distal end includes reverse threads.

54. The method of claim 51 wherein said distal end of said adjustable connecting rod is configured to connect to either of said shovel bucket or said fixed connecting rod and said proximal end of said adjustable connecting rod is configured to connect to either of said shovel bucket or said fixed connecting rod.

55. The method of claim 51 wherein the length of said adjustable connecting rod may be adjusted by screwing or unscrewing said proximal end of said adjustable connecting rod and/or said distal end of said adjustable connecting rod into or from a nut adjustable of said adjustable connecting rod.

56. The method of claim 51 wherein said adjustable connecting rod includes at least one lock pin connected to a portion of said proximal end or said distal end of said adjustable connecting rod and at least one lock pin assembly connected to a nut adjustable of said adjustable connecting rod.

57. The method of claim 51 wherein the distance between the pivot point of said distal end of said connection of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is within the range of 813 millimeters and 850 millimeters.

58. The method of claim 51 wherein the length of said adjustable connecting rod may be adjusted such that the distance between the pivot point of said proximal end of said adjustable connecting rod and the pivot point of said distal end of said adjustable connecting rod is within the range of 813 millimeters and 850 millimeters.

59. The method of claim 51 wherein said adjustable connecting rod includes at least one wear plate.

60. The method of claim 51 wherein said eccentric base support is configured to stop motion of said proximal end of said fixed connecting rod towards said shovel bucket.

61. The method of claim 51 wherein said eccentric base support is configured to support said proximal end of said fixed connecting rod and/or said proximal end of said adjustable connecting rod.

62. The method of claim 51 wherein said eccentric base support is configured to support the proximal end of said fixed connecting rod and/or the proximal end of said adjustable connecting rod and includes at least one of a guide, a steal liner, a rubber liner, and a stop.

63. The method of claim 51 wherein said eccentric base support is configured to support an eccentric assembly such that rotation of said eccentric assembly will allow an eccentric roll-wear plate connected to said eccentric assembly to contact said proximal end of said adjustable connecting rod.

64. The method of claim 51 further comprising rotating an eccentric assembly configured to move said proximal end of said adjustable connecting rod by applying a force to said proximal end of said adjustable connecting rod, said force being directed away from said shovel bucket.

65. The method of claim 51 further comprising rotating an eccentric assembly such that an eccentric roll-wear plate connected to said eccentric assembly will contact said proximal end of said adjustable connecting rod.

66. The method of claim 51 wherein said fixed connecting rod is configured to connect to said door by connecting to a door mount assembly that is configured to connect to said fixed connecting rod, said shovel bucket, and said door.

67. The method of claim 51 wherein said door will not open from a closed position unless said proximal end of said adjustable connecting rod is moved at least said predetermined distance.

68. The method of claim 51 wherein said predetermined distance is at least 10 millimeters.

69. The method of claim 51 wherein said predetermined distance is between 10 millimeters and 20 millimeters.

70. The method of claim 51 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is greater than or equal to zero when said door is closed.

71. The method of claim 51 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is greater than or equal to zero but less than or equal to 1.5 degrees when said door is closed.

72. The method of claim 51 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is approximately 1.5 degrees when said door is closed.

73. The method of claim 51 wherein an angle created by said fixed connecting rod and the distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is less than zero when said door is open.

74. The method of claim 51 wherein said distance between the pivot point of said distal end of said fixed connecting rod and the pivot point of said distal end of said adjustable connecting rod is approximately 2,146 millimeters when said door is closed.