QUICK-ATTACH SECONDARY LIFT MECHANISM FOR SNOWPLOWS
A secondary lift mechanism configured for quick attachment to an existing snowplow assembly. A secondary lift mechanism is intended as a backup lift mechanism in the event the primary lift mechanism of a snowplow assembly fails. The secondary lift mechanism (the secondary snowplow lift mechanism) is attachable to the lift arm of any of a variety of snowplow assemblies without the use of tools. A novel mounting plate allows the secondary snowplow lift mechanism to be quickly ad easily attached to a variety of lift arm configurations common to various snowplow assemblies. the secondary snowplow lift mechanism restores vertical control of the moldboard when the primary lift mechanism has failed.
The present application claims priority under 35 U.S.C. §119(e) from the following previously-filed Provisional patent Application, U.S. Application No. 61/108,629, filed Oct. 27, 2008, entitled “Quick-Attach Secondary Lift Mechanism for Snowplows,” and which is incorporated herein by reference in its entirety.
TECHNICAL FIELDThe present exemplary system and method relates to lift mechanisms for snowplow assemblies. More particularly, the present exemplary system and method relates to removable secondary lift mechanisms attachable to snowplow assemblies.
BACKGROUNDA wide variety of snowplows have been used for a number of years to remove snow from roads and parking lots. Several manufactures have developed snowplows that are mountable on nearly any vehicle. Typically, such snowplow assemblies include a frame portion mounted to the vehicle, a lift portion often including a hydraulic pump, a moldboard, and an A-frame allowing the moldboard to be turned side-to-side, raised, and lowered.
Many components of a snowplow assembly undergo significant stress during use. It is not uncommon for portions of the assembly to break or bend upon impact with snow, curbs and other objects. The cold temperatures present during the winter season only act to aggravate the likelihood of breakage. While the metal components of a snowplow can be bent and broken, they are not the only components of the assembly that may fail. A majority of snowplow assemblies include a lift mechanism actuated by a hydraulic pump. The hydraulic pump often performs the function of lifting the moldboard, via a lift arm and chain, and also turning the boldboard from side-to-side.
According to many traditional embodiments, a hydraulic pump is connected to large piston. When the piston is extended a lift arm is forced upward. The lift arm, connected by a chain or cable to the A-frame will cause the A-frame to pivot upward. This pivoting action of the A-frame will raise the moldboard. Similarly, the piston can be released causing the lift arm, A-frame, and moldboard to lower again. In a similar fashion, smaller pistons located on the A-frame allow the moldboard to be pivoted side-to-side.
During a snowstorm, snowplow operators often work through the night. A broken snowplow often costs the operator or owner a significant amount of money in lost income. Consequently, any failure with the snowplow assembly, including the hydraulic pump, is a financial setback. Furthermore, it is often not possible to fix the snowplow until it is too late to recuperate the lost income. Of particular interest to the present system and method is failure of the hydraulic pump. When the hydraulic pump fails, the operator is unable to utilize the snowplow. Often professional services are required to repair this mechanically complicated hydraulic pump. The operator is forced to retire the truck and snowplow until professional services can be obtained, this may result in significant lost income and possibly lost clients.
SUMMARYA secondary snowplow lift mechanism is provided herein. the secondary snowplow lift mechanism is configured to attach to a preexisting snowplow assembly in the event the primary lift mechanism fails. According to several exemplary embodiments, a secondary snowplow lift mechanism is secured to the lift arm of a preexisting snowplow assembly without the use of tools. This provides a distinct advantage in that the secondary snowplow lift mechanism is easily attached when the primary lift mechanism fails, instantly allowing the operator to continue plowing. According to one embodiment, the secondary snowplow lift mechanism includes an electric motor attached to a wound cable, a hook to connect the cable to the A-frame of a preexisting snowplow assembly, and a mounting plate configured to secure the secondary snowplow lift mechanism to the lift arm of the preexisting snowplow assembly. No modification of the original snowplow assembly is necessary.
According to one embodiment of the present system and method, an electric motor may be any number of sizes, shapes, and strengths. A mounting plate acts to couple the secondary snowplow lift mechanism to the lift arm of the snowplow assembly. The mounting plate, according to one exemplary embodiment, is configured to allow the secondary snowplow lift mechanism to be mountable on any of the numerous varieties of lift arms. Consequently, the secondary snowplow lift mechanism, comprising a lift mechanism and such a mounting plate can be universally mounted to any snowplow assembly.
One exemplary embodiment of the secondary snowplow lift mechanism includes connecting the secondary snowplow lift mechanism directly to the vehicle's battery via alligator or parrot jaw clamps. Alternatively, according to another exemplary embodiment, the secondary snowplow lift mechanism is configured with cables to be connected directly to the electric leads of the preexisting hydraulic pump.
According to one exemplary embodiment of the secondary snowplow lift mechanism, a controller is placed within the vehicle near the operator to control the up and down movement of the lift mechanism of the secondary snowplow lift mechanism. According to one exemplary embodiment, a cable extending from the secondary snowplow lift mechanism through the vehicle's door or window connects the controller to the electric motor. Alternatively, the controller may be wirelessly connected to the electric motor. According to yet another exemplary embodiment, the electric motor is configured with an adapter allowing the preexisting hydraulic pump's controller and power source to be connected to the secondary snowplow lift mechanism. According to this embodiment, the operator is able to use the preexisting controller and need not connect additional cables to the vehicle's battery.
According to various exemplary embodiments of the present system and method, the wound cable controlled by the electric motor may comprise various sizes, braids, and strengths of metal cables, or alternatively a strap or chain might be used. Furthermore, any number of means of connecting the strap cable, or chain to the A-frame or directly to the moldboard may be utilized, including a hook, D-rings, carabineers, clamps, magnets, a combination thereof, or simply looping the strap, cable or chain around a portion of the either the A-frame or moldboard. Additional elements of various embodiments are described in detail below.
The accompanying drawings illustrate various embodiments of the present system and method and are a part of the specification. The illustrated embodiments are merely examples of the present system and method and do not limit the scope thereof. Several drawings include features of the secondary snowplow lift mechanism interacting with a snowplow assembly according to one exemplary embodiment. However, the present system and method is configured for use with a variety of snowplow assemblies according to various embodiments.
Throughout the drawings, identical reference numbers identify similar elements or acts. The sizes and relative positions of elements in the drawings are not necessarily drawn to scale. For example, the shapes of various elements and angles are not drawn to scale, and some of these elements are arbitrarily enlarged and positioned to improve drawing legibility. Further, the particular shapes of the elements as drawn, are not intended to convey any information regarding the actual shape of the particular elements, and have been solely selected for ease of recognition in the drawings.
DETAILED DESCRIPTIONAn exemplary system and method providing a secondary lift mechanism configured for attachment to a snowplow assembly is provided below. Several embodiments of the present system and method are provided wherein the secondary lift mechanism is configured to be attached to a snowplow assembly without the use of tools. Several unique embodiments of the present exemplary system and method are provided; however, any individual embodiment may be used exclusive of, or in conjunction with, one or more alternative embodiments. While it may be advantageous to secure the present system and method without the use of tools, alternative embodiments allow the system to be secured with tools.
Numerous specific details are set forth for purposes of explanation and to provide a thorough understanding of a secondary lift mechanism for quick attachment to a snowplow assembly. It will be apparent, however, to one skilled in the art, that the present systems and methods may be practiced without one or more of these specific details. Reference in the specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. The appearance of the phrase “in one embodiment” in various places in the specification are not necessarily all referring to the same embodiment.
Unless the context requires otherwise, throughout the specification and claims which follow, the word “comprise” and variations thereof, such as, “comprises” and “comprising” are to be construed in an open, inclusive sense, that is as “including, but not limited to.”
Throughout the description the words “chain” and “cable” shall be understood to mean any structural connecting member, including, but not limited to, a cord, a wire, a strap, a cable, a chain, a rope, linked members of alternative suitable materials and/or other similar objects.
Additionally the term “lift arm” used throughout the description and claims is explained herein as being the mechanical feature that a primary lift pump or motor actuates. A cable or chain attached to the lift arm translates the force of the lift pump or motor to raise the moldboard of a snowplow. Although several snowplow manufacturers may refer to this mechanical feature by alternative names, including chain mount, lift plate, chain plate, arm, etc, throughout the specification and claims, this mechanical feature will be referred to as the “lift arm”.
The following description is presented to illustrate and describe several embodiments of the present exemplary system and method; it is not intended to limit the system and method to any exact form disclosed in conjunction with the various embodiments.
The present system and method provides a lift mechanism configured for quick attachment to a snowplow assembly. A greater understanding of the present system and method will be attained by considering the presented details in light of one of the primary purposes of the system and method, namely, to provide a backup plan in the event of a primary lift mechanism's failure. According to one exemplary embodiment, the present system and method (“the secondary snowplow lift mechanism”) is configured for use with a preexisting snowplow assembly. the secondary snowplow lift mechanism provides a secondary, “backup”, lift mechanism for a preexisting snowplow assembly when the primary, typically hydraulic, lift mechanism fails. One distinct advantage of the secondary snowplow lift mechanism, according to various embodiments, is that it can be attached to an existing snowplow assembly easily and quickly, without the use of tools or modification of the original snowplow assembly.
A traditional snowplow assembly attached to a vehicle is described below with particular focus on the lift mechanism and lift arm. Subsequently, an exemplary embodiment of the secondary snowplow lift mechanism is described in detail. A mounting plate configured to attach the secondary snowplow lift mechanism to an existing lift arm is then described followed by the secondary snowplow lift mechanism secured to a snowplow assembly. Finally, a detailed description of the functionality of a snowplow assembly configured with the secondary snowplow lift mechanism is described in conjunction with an exemplary method of installment and use.
EXEMPLARY EMBODIMENTSThe raising and lowering of the moldboard (170) is exemplified in
The previously described traditional snowplow assembly (110) of
A detailed view of the lift mechanism (250) including the piston (150) and lift arm (130) is illustrated in
The previous section provides a detailed understanding of the lift mechanism (250) common to many snowplow assemblies. The present system and method, the secondary snowplow lift mechanism, provides a tool-less attachment of a secondary lift mechanism when the primary lift mechanism (250) fails. the secondary snowplow lift mechanism will be described below in conjunction with the specific details of
According to one exemplary embodiment, a snowplow operator controls the electric motor (310) of the secondary snowplow lift mechanism. The coil of cable (320) is directly attached to the electric motor (310) and by winding the coil (320) about the drum, the hook (355) is raised, thereby raising the moldboard (170,
Regarding the coil of cable (320), the term cable is defined above as including, but not being limited to, a cord, a wire, a strap, a chain, or other similar object. With this in mind, a cable (325) may be of any suitable length, so long as it is sufficient to extend from the secondary snowplow lift mechanism to either portion of a moldboard or an A-frame. The hook (355) at one end of the cable (325) can be secured to a portion of the existing snowplow assembly. During the attachment of the secondary snowplow lift mechanism to an existing snowplow assembly, an operator releases the clutch (380). With the clutch (380) released, the operator freely pulls the cable (325) from the coil (320). The clutch (380) enables the operator to secure the hook (355) where desired. By returning the clutch (380) to a locked position, the coil of cable (320) is secured again. In a locked position, the clutch (380) prevents the cable (325) from both winding and unwinding without direct operation of the electric motor (310).
According to one exemplary embodiment, the secondary snowplow lift mechanism (300) is secured to a lift arm (130,
The backside of the mounting plate (400) described in reference to the drawing
Should it be desired, a mounting plate may be configured that would allow for securement to any portion of a snowplow assembly, not exclusively a lift arm. Odd shaped extension members and additional holes or other features are within the scope of the present system and method. Indeed, considering the wide variety of possible snowplow assemblies it is expected that many variations of mounting plates are possible. It is conceivable and within the scope of the present system and method to customize a mounting plate allowing the secondary snowplow lift mechanism (300) to be mounted on any possible snowplow in a variety of locations.
The purpose of the mounting plate (400) is to provide a coupling means between the main portions of the secondary snowplow lift mechanism (300) and a snowplow assembly (110). Consequently, many possible variations exist and are possible when alternative snowplow assemblies and alternative the secondary snowplow lift mechanism configurations are used. According to one exemplary embodiment, a typical winch is used instead of a custom electric motor (310), cable (325), coil (330), and frame (330). Accordingly, depending on the configuration of the winch, a mounting plate (400) may be configured for attachment to the specifics of a given winch.
Ultimately, while many variations of the backside (shown in
Previously unmentioned, the mounting plate (400), according to one exemplary embodiment, is configured with a loop (480). In several applications the loop (480) provides a means for the cable (325) to be passed there through in order to impart a downward force on the extension members (470) when the cable is retracted, aiding in the securement of the mounting plate (400) and in the overall securement of the secondary snowplow lift mechanism (300). The loop (480) provides another means of allowing a single configuration of a mounting plate (400) to be used with a wide variety of snowplow assemblies.
Once in place as is illustrated in
With the secondary snowplow lift mechanism (300) fully secured to the lift arm (130) and the cable (325) secured by means of the hook (355) to the A-frame (140), the electrical connections necessary for a user to operate the secondary snowplow lift mechanism (300) can be made.
According to alternative embodiments, the controller (810) may be wirelessly connected to the electric connectors (315), as opposed to the illustrated method via a cable (815). Additionally, it is also conceivable to connect the power cables (825) to the preexisting power cables on the primary lift mechanism. According to one exemplary embodiment, the power cables are connected from a relay box near electric connectors (315) on the secondary snowplow lift mechanism (300) to the power input terminals on the primary lift mechanism. Additionally, either an adaptor or a splice connects the preexisting snowplow controller to the relay box. According to this embodiment, advantages may include not having to run a new controller to the operator, and not having to attach cables to the battery. However, a drawback may include including cable adaptors for the electric connectors to accommodate the variety of snowplows or splice wires.
By pressing ‘up’ on the controller (810) power will be transferred from the battery (820) to the electric motor (310). This will cause the coil of cable (320) to wind the cable (325), which in turn will pull the A-frame (140) upwards via the hook (355). The upward force on the A-frame (140) will pivot about the connection point (143) and cause the moldboard (170) to rise. If the primary lift mechanism (250,
According to one exemplary embodiment, the secondary snowplow lift mechanism (300) is extended to include two similar apparatuses mounted near the pistons (185) located on the A-frame (140). These two similar smaller versions of the secondary snowplow lift mechanism may be connected to the same controller (810) adding ‘left’ and ‘right’ (side-to-side) functionality to the overall system. Consequently, according to this exemplary embodiment, three the secondary snowplow lift mechanism apparatus are connected to the existing snowplow assembly returning full functionality to a snowplow assembly with a failed primary lift mechanism.
Method of UseBefore attaching the secondary snowplow lift mechanism (300) to a snowplow assembly (120) the first step is to remove the chain (135,
With the secondary snowplow lift mechanism (300) secured to the lift arm (130), an operator releases the clutch (380). With the clutch (380) released, the operator is free to pull the hook (355) and unwind enough cable (325) to secure the hook (355) to either a portion of the A-frame (140) or to the moldboard (170) itself (Step 4). Should there not be an adequate location for the hook (355) to be secured, D-rings may be attached to the moldboard (170) or the A-frame (140). The D-rings provide a location for the hook (355) to be attached. Once the hook (355) is in place, the clutch (380) is locked again (Step 5). This ensures that only the electric motor (310) will control the cable (325) being wound and unwound. In other words, the electric motor (310) allows the cable (325) to raise the moldboard (170) without the cable (325) freely unwinding because the clutch is locked.
Finally, the power cables (825) are connected to the battery (820) and a cable (815) connects a controller (810) to the electric connectors (315) on the secondary snowplow lift mechanism (300). The power cables (825), according to one exemplary embodiment, are connected directly to the battery (820) through the use of alligator clamps or parrot jaw clamps (Step 6). According to one exemplary embodiment, a cable (810) runs through the window or door of a vehicle connecting the controller (810) to the electric connectors (315). Alternative embodiments include wireless connectivity, and power cables (825) connecting to existing lift mechanisms, possibly allowing the use of the existing controller to control the movement of the secondary snowplow lift mechanism (300).
The preceding description provides a method of securing the secondary snowplow lift mechanism to a snowplow assembly, according to one exemplary embodiment. The steps delineated in
The preceding description has been presented only to illustrate and describe the present method and system. It is not intended to be exhaustive or to limit the present system and method to any precise form disclosed. Many modifications and variations are possible in light of the above teaching.
The foregoing embodiments were chosen and described in order to illustrate principles of the system and method as well as some practical applications. The preceding description enables others skilled in the art to utilize the method and system in various embodiments and with various modifications, as are suited to the particular use contemplated. It is intended that the scope of the present exemplary system and method be defined by the following claims.
Claims
1. A snowplow apparatus comprising:
- a first member configured to selectively raise and lower a second member of a snowplow; and
- a mounting plate;
- wherein said mounting plate is configured to removably couple said first member to a portion of a snowplow assembly.
2. The snowplow apparatus of claim 1, wherein said portion of said snowplow assembly comprises a lift arm of said snowplow assemblies.
3. The apparatus of claim 1, wherein said second member comprises a flexible member.
4. The apparatus of claim 3, wherein said second member comprises one of a strap, cable, wire, chain, rope, or linked members.
5. The apparatus of claim 3, wherein said first member comprises
- a drum;
- an motor coupled to said drum;
- said flexible member comprising a first end and a second end, said first end being secured to said drum;
- wherein said motor is configured to rotate said drum, thereby winding said flexible member about said drum.
6. The apparatus of claim 5, wherein said second end of said flexible member is fixedly attached through a securing means to a portion of said snowplow assembly, wherein when said flexible member is wound about said drum a moldboard of said snowplow assembly is raised.
7. The apparatus of claim 6, wherein said securing means comprises a hook configured to be secured to an A-frame of said snowplow assembly.
8. The apparatus of claim 6, wherein said motor coupled to said drum is configured to rotate said drum in two directions;
- a first direction causing said flexible member to be wound about said drum; and
- a second direction causing said flexible member to be unwound from said drum;
- wherein a controller controls the direction of rotation of said drum from within a vehicle to which said snowplow assembly is attached.
9. A detachable snowplow lift mechanism comprising:
- a drum;
- a motor coupled to said drum;
- a flexible member comprising a first end and a second end, said first end being secured to said drum;
- a mounting plate;
- a controller communicatively coupled to said motor; and
- at least one power lead configured to couple said motor to a power source;
- wherein said motor is configured to rotate said drum, to selectively wind said flexible member about said drum; and
- wherein said mounting plate is configured to secure said detachable lift mechanism to a snowplow assembly.
10. The detachable lift mechanism of claim 9, wherein said mounting plate is configured to secure said detachable lift mechanism to a lift arm of said snowplow assembly.
11. The detachable lift mechanism of claim 9, wherein said flexible member comprises one of a strap, a cable, a wire, a chain, a rope, or linked members.
12. The detachable lift mechanism of claim 9, wherein said second end of said flexible member is detachably coupled to a second portion of said snowplow assembly;
- wherein when said flexible member is wound about said drum, said flexible member causes a moldboard of said snowplow assembly to rise.
13. The detachable lift mechanism of claim 12, wherein said flexible member is detachably coupled to said snowplow assembly by a hook configured to secure said flexible member to an A-frame of said snowplow assembly.
14. The detachable lift mechanism of claim 13, further comprising a controller;
- wherein said controller is communicatively connected to said motor; and
- wherein said controller transmits a signal to said motor causing said motor to selectively rotate in either of a first direction or a second direction;
- said first direction causing said flexible member to be wound about said drum, causing said moldboard to rise; and
- said second direction causing said flexible member to be unwound from said drum, causing said moldboard to lower.
15. A mounting plate comprising:
- a front portion; and
- a rear portion;
- said front portion of said mounting plate further includes at least one attachment feature configured to secure said mounting plate to a lift mechanism; and
- said rear portion of said mounting plate further including at least one extension member configured to be securely mated with a portion of a snowplow assembly.
16. The mounting plate of claim 15, wherein said portion of said snowplow assembly comprises a lift arm;
- said at least one extension member including at least one mounting tab configured to engage with a chain-securing feature of said lift arm.
17. The mounting plate of claim 16, comprising at least three mounting tabs formed on said rear portion of said mounting plate;
- said at least three mounting tabs being configured to engage with a chain-securing feature of said lift arm.
18. The mounting plate of claim 17, wherein said mounting plate is secured to a lift arm without the use of tools;
- wherein each of said at least three mounting tabs further define a thru-bore, said thru-bores being aligned and configured to receive a pin;
- said pin being configured to lock said mounting plate to said lift arm.
19. The mounting plate of claim 15, further defining thru-bores configured to receive and pass fasteners through said mounting plate to secure said mounting plate to said lift mechanism.
20. The mounting plate of claim 19, wherein said attachment features comprise protruding features, wherein said protruding features are configured to engage said lift mechanism and aid in securing said mounting plate to said lift mechanism.
Type: Application
Filed: Oct 27, 2009
Publication Date: Apr 29, 2010
Inventor: Andrew Roberts (Salt Lake City, UT)
Application Number: 12/606,916
International Classification: E01H 5/06 (20060101); E01H 5/04 (20060101);