BOAT PORTAGE APPARATUS AND METHOD
Embodiments of the present invention include a stationary boat lift in which boats can enter and exit quite readily. The boat lift allows a boat to bypass various barriers in a safe and efficient manner by orienting the boat in a direction substantially parallel to the barrier, vertically lifting the boat out of one waterway, laterally translating the boat horizontally over the barrier, and then vertically lowering the boat into a second waterway.
This utility patent application claims priority to U.S. Provisional patent application Ser. No. 60/725,535 filed on Oct. 11, 2005, which is incorporated herein by reference in its entirety. This application also incorporates by reference U.S. Pat. Nos. 6,457,904; 6,174,106; and 5,947,639.
TECHNICAL FIELDThe embodiments of the present invention relate to a lifting apparatus used to portage a boat. More specifically, the embodiments of the present invention relate to mechanisms and methods for lifting a boat out of a body of water and transferring the boat horizontally over a barrier.
BACKGROUNDIn the context of this invention, “portage” means to carry a boat and/or its supplies overland from a first body of water, between two waterways or around an obstacle to navigation. Known within the prior art are devices for lifting boats out of water for such purposes as making repairs, protecting them from dock collision caused by tidal action, and mitigating or preventing damage to their hulls due to excessive water exposure. U.S. Pat. No. 5,184,914 describes and shows a boat lift that consists of a frame that cradles and lifts a boat from the water by means of a hydraulic ram. The device requires a person to enter the water to secure several members of the device around the bottom of the hull. U.S. Pat. No. 5,593,247 describes a programmable boat lift control system that with the push of a button causes the lift to either raise or lower the boat to a pre-programmed elevation.
Both of these devices are useful for their intended purposes, however, both are limited to lifting and lowering the boat in a vertical direction. Unfortunately, this was indicative of the general state of the art in boat lifting devices. The prior art fails to teach an apparatus that can lift and lower a boat in a vertical direction, as well as transfer the boat in a horizontal direction. Prior art references also fail to teach orienting a boat parallel to the barrier and then lifting the boat out of the water. By orienting a boat parallel to the barrier it is meant that the starboard or port side of the boat is juxtaposed to the edge of the barrier. Applicant has discovered the need to transfer boats over barriers, from one body of water to another. Notably, in many areas, salt water and fresh water are separated by various types of barriers, such as water divider walls and land barriers. Often barriers are needed to separate fresh from salt water due to the various types of organisms, plants, and animals that can survive only in one type of environment, i.e., either in salt or in fresh water, but not both. Regardless of the need to isolate salt from fresh water, boats and other water vehicles frequently require access to, from, and between separate water bodies.
A novel approach to prior art inventions includes a lifting apparatus that allows an operator to orient their boat sideways in relation to the lifting apparatus and/or barrier (i.e., perpendicular to the line of travel). In this fashion, the boat will be easier to maneuver and control. Also, for many boats, the hull shape would suggest that its center of gravity will be positioned more appropriately. Therefore, there is a need to provide a lift that allows a boat to be oriented in a sideways manner relative to the barrier and to portage the boat in that direction (i.e., star-board-to-port or vice versa).
SUMMARYIn one embodiment of the present invention a boat lift includes a base structure having a first frame section erected over a barrier wherein the barrier is juxtaposed to at least a first body of water. It is noted that the barrier may also separate two bodies of water or an obstacle to navigation in the water. The base structure may also include a second frame section cantilevered over the first body of water, and a lift frame operatively connected to the base structure. A cradle assembly, including a cradle support and/or boat sling capable of receiving an associated boat for carrying the associated boat across the barrier, is moveably connected to the lift frame and more specifically to the base structure. A mechanism or actuator for actuating the cradle assembly is also incorporated into the boat lift.
One aspect of the embodiments of the present invention includes a horizontally moveable lift frame capable of traversing the second frame section, and a mechanism for actuating the lift frame.
Another aspect of the embodiments of the present invention includes the base structure having a third frame section cantilevered over a second body of water where the horizontally moveable lift frame is capable of traversing the third frame section.
In yet another aspect of the embodiments of the present invention the lift frame and the cradle assembly are capable of translating the associated boat across the barrier with either of the associated boat's port side or starboard side approaching the barrier. The horizontally moveable lift frame and the cradle assembly are capable of carrying and releasing the associated boat into the second body of water in a direction substantially parallel to the barrier.
Still another aspect of the embodiments of the present invention includes a boat lift apparatus having a non-water retaining boat-support mechanism that includes one or more flexible straps for receiving the associated boat, wherein the one or more flexible straps are selectively adjustable to receive one of first and second substantially different associated boats. The non-water retaining boat-support mechanism may also include a net for receiving and lifting the associated boat.
In another embodiment of the present invention a method for transporting a boat over a barrier juxtaposed to a first body of water includes the steps of providing a base structure having a moveable lift frame and a cradle assembly, positioning the moveable lift frame extending over the first body of water, positioning the cradle assembly into the first body of water, maneuvering an associated boat into the cradle assembly, wherein the starboard or port side of the associated boat is juxtaposed to the barrier, raising the cradle assembly to lift the associated boat out of the first body of water and to an elevation that is higher than the barrier, and translating the associated boat across the barrier.
After the boat has entered the boat lift it may be positioned over a boat-support mechanism. This means of support could be adjustable, such as a set of two or more nylon straps. However, it is contemplated that alternate supporting mechanisms could be used including a heavy gauge net and/or a rigid cradle assembly. In employing straps, one strap may be located near the bow or front portion of the boat while another strap may be located near the stern or rear portion of the boat. A motor and cables may be used to lower or raise the cradle.
Once the boat is in a fully raised position, the boat lift translates the boat in a substantially horizontal direction over the barrier. Translating is actuated by a motor which powers a conveyance mechanism, such as a set of track wheels, to move the boat lift back and forth. An operator is able to easily control the functioning of the boat lift through a control panel located near or within the boat lift. It is also contemplated that an operator may direct the boat lift's functioning via a remote control device. In one embodiment, the boat lift may serve as an alternate to a lock, whereby the bodies of water may be at different levels. Despite the differences in relative elevations, the boat's movement may still be in a substantially horizontal, albeit inclined, direction of travel.
One aspect of the embodiments of the present invention includes laterally translating the associated boat with respect to the associated boat's forward direction of travel.
Another aspect of the embodiments of the present invention includes positioning the moveable lift frame and the boat over a second body of water and lowering the cradle assembly to release the boat into the second body of water where the starboard or port side of the associated boat is juxtaposed to the barrier.
Yet another aspect of the embodiments of the present invention includes a vertically moveable cradle assembly where the cradle assembly includes a boat cradle and/or boat sling capable of receiving a boat, for carrying the boat across the barrier and for releasing the boat into the second body of water in a direction substantially parallel to the barrier.
Another aspect of the embodiments of the present includes vertically moving the moveable cradle assembly to maintain a constant elevation above the surface of the barrier.
Still another aspect of the embodiments of the present invention includes weights attached to a non-water retaining boat-support mechanism.
Even another aspect of the embodiments of the present invention includes releasing the boat into the second body of water wherein the starboard or port side of the boat is juxtaposed to the barrier.
Other aspects will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying figures.
BRIEF DESCRIPTION OF THE FIGURES
In the following description of the embodiments of the present invention, reference is made to the accompanying drawings which, in conjunction with this detailed description, illustrate and describe a boat lift capable of hoisting a boat out of one body of water, translating the boat sideways in a horizontal direction over a barrier and then lowering the boat into a second body of water. Referring to
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The lift frame 60 may also include a mechanism or lifting unit 82 that actuates the cradle assembly 100. The lifting unit 82 may include a motor and gear reducer 83, drive sprockets 84, drum sprockets 86, linkage 88, drum shafts 90, shaft coupler 91, bearings 92, drums 94, cable 96, and lead blocks 98. The motor and corresponding gear reducer 83 drive the drive sprockets 84 that in turn drive drum sprockets 86 via linkage 88. The drum sprockets 86 may then be used to drive drum shaft 90 and the attached drums 94 to raise and lower the cradle assembly 100. In one embodiment, the lifting unit 82 contains two drive shafts, each operating one of two sides of the cradle assembly 100. Each drive shaft may be formed by connecting two drum shafts 90 via a coupler 91. However, it is contemplated that a single continuous drive shaft may exist without the need for coupler 91. Each drum shaft 90 may be constrained to lift frame 60 via bearings 92. Accordingly, drums 94 may contain cable 96 or rope, which may be metal cable or rope, or any other commercially known product that can be used on a drum to raise and lower cradle assembly 100, such as a polymeric fiber, or composite strap. The cables 96 may then extend from the drums 94 to vertical lead block 98, which directs the cables 96 down to the cradle assembly 100.
The cradle assembly 100 may function to accept, carry, and release the boat 12. As previously described, the cradle assembly 100 attaches to lift frame 60 via extendable supporting means such as tension-bearing cables 96, chains, beams, rigid members, or any other means as is appropriate for use with the embodiments of the present invention. Accordingly, extending or retracting the supporting means will lower or raise the cradle assembly 100 respectively. As illustrated in
As mentioned, the cradle assembly 100 may include of a pair of boat slings 106. The boat slings 106 may be fabricated from high strength polyester that is resistant to damage from abrasion and deterioration from water exposure. The boat slings 106 may also be fabricated from materials offering similar wear resistance like that of nylon. It is also contemplated that the boat sling 106 for carrying boat 12 may be comprised of other suitable means, including but not limited to, a heavy gauge net 106″ which may be coupled to connectors at its extremities. Like the straps 106′, such heavy gauge net 106″ may also be produced from nylon or high strength polyester. To assist the boat slings 106 in submerging rather than floating, weights 110 may be provided with the boat slings 106. In one embodiment, weights 110 are sewn into packets provided in the boat slings 106. The cradle assembly 100 and/or the weights 110 may not retain water when the boat 12 is lifted out of the water. In an alternate embodiment, the cradle assembly 100 may employ a rigid structure, as shown in
With reference now to all of the Figures, in use the lift frame 60 of the boat lift 10 is positioned over the first body of water 14 thereby positioning the cradle assembly 100 over the first body of water 14. The cradle assembly 100 may then be lowered into a position where the boat sling 106 and the corresponding weights submerge beneath the water. It is noted here that track 34 is cantilevered over the first body of water thereby allowing the boat sling 106 to be oriented so as to receive the boat 12 in a sideways manner. That is to say that the boat 12 may be maneuvered to juxtapose the port or starboard sides of the boat 12 to the barrier 18 and the boat lift 10. The boat 12 may then be driven over the boat sling 106 for subsequent lifting and translating by the boat lift 10 in a manner consistent with the embodiments described herein. If straps are used, at least one of the straps can be adjusted to accommodate different length boats 12. The boat 12 may then be translated over the barrier by engaging the lifting unit 82 to raise the boat 12 and laterally moving the lift frame 60. During movement, the boat 12 may held at constant elevation above the surface of the barrier. Accordingly, the boat lift 10 may include a control unit that automatically adjusts the elevation based upon one or more sensors, not shown. After the boat 12 is lifted and successfully translated over barrier 18, it can then be lowered into the second body of water 16 for navigation as desired in the second body of water.
Although the invention has been described herein with reference to the present embodiments, it will become apparent to those skilled in the art that various modifications of the present embodiments of the invention as described herein can be made without departing from the spirit or scope of the invention as defined by the appended claims.
Claims
1. A method for transporting a boat over a barrier juxtaposed to a first body of water, the method comprising the steps of:
- providing a base structure having a moveable lift frame and a moveable cradle assembly;
- positioning the moveable lift frame extending over the first body of water;
- positioning the moveable cradle assembly into the first body of water;
- maneuvering an associated boat into the moveable cradle assembly, wherein the starboard or port side of the associated boat is juxtaposed to the barrier;
- raising the moveable cradle assembly to lift the associated boat out of the first body of water and to an elevation that is higher than the barrier;
- translating the associated boat across the barrier.
2. The method as defined in claim 1, wherein the step of:
- translating the associated boat across the barrier, comprises the step of:
- laterally translating the associated boat with respect to the associated boat's forward direction of travel.
3. The method as defined in claim 1, further comprising the step of:
- positioning the moveable lift frame and the associated boat over a second body of water; and,
- lowering the moveable cradle assembly to release the associated boat into the second body of water.
4. The method as defined in claim 3, further comprising the step of:
- releasing the associated boat into the second body of water wherein the starboard or port side of the associated boat is juxtaposed to the barrier.
5. The method as defined in claim 1, wherein the step of:
- translating the associated boat across the barrier, comprises the step of:
- horizontally moving the moveable lift frame thereby translating the associated boat across the barrier.
6. The method as defined in claim 5, wherein the step of:
- horizontally moving the moveable lift frame thereby translating the associated boat across the barrier, comprises the step of:
- horizontally moving the moveable lift frame thereby translating the associated boat across the barrier and vertically moving the moveable cradle assembly to maintain a constant elevation above the surface of the barrier.
7. The method as defined in claim 1, wherein the step of:
- providing a base structure having a moveable lift frame and a moveable cradle assembly, comprises the step of:
- providing a base structure having a first frame section erected over the barrier and at least a second frame section cantilevered over the first body of water, the base structure having a moveable lift frame and a moveable cradle assembly;
8. A boat lift apparatus comprising:
- a base structure having a first frame section erected over a barrier wherein the barrier is juxtaposed to a first body of water, the base structure having a second frame section cantilevered over the first body of water;
- a lift frame operatively connected to the base structure;
- a cradle assembly including at least a first boat-support mechanism capable of receiving an associated boat for carrying the associated boat across the barrier, the cradle assembly being moveably connected with respect to the lift frame; and,
- a mechanism for actuating the cradle assembly.
9. The boat lift apparatus as defined in claim 8, wherein the lift frame is a horizontally moveable lift frame capable of traversing the second frame section; and further comprising:
- a mechanism for actuating the lift frame.
10. The boat lift apparatus as defined in claim 9, wherein the barrier separates the first body of water from a second body of water, and,
- wherein the base structure includes a third frame section cantilevered over the second body of water, and,
- wherein the horizontally moveable lift frame is capable of traversing the third frame section.
11. The boat lift apparatus as defined in claim 10, wherein the lift frame and the cradle assembly are capable of translating the associated boat across the barrier with either of the associated boat's port side or starboard side approaching the barrier.
12. The boat lift apparatus as defined in claim 10, wherein the horizontally moveable lift frame and the cradle assembly are capable of carrying and releasing the associated boat into the second body of water in a direction substantially parallel to the barrier.
13. The boat lift apparatus as defined in claim 9, wherein the horizontally moveable lift frame includes a guiding mechanism comprising one or more of: tracks, rollers, or bearings.
14. The boat lift apparatus as defined in claim 9, wherein the second frame section extends entirely above the first body of water.
15. The boat lift apparatus as defined in claim 9, wherein the at least a first boat-support mechanism comprises:
- a rigid non-water retaining boat sling connected to the lift frame.
16. The boat lift apparatus as defined in claim 9, wherein the at least a first boat-support mechanism comprises:
- a flexible non-water retaining boat sling connected to the lift frame.
17. The boat lift apparatus as defined in claim 16, further comprising:
- weights attached to the flexible non-water retaining boat sling.
18. The boat lift apparatus as defined in claim 17, wherein the flexible non-water retaining boat sling includes one or more flexible straps for receiving the associated boat.
19. The boat lift apparatus as defined in 18, wherein the one or more flexible straps are selectively adjustable to receive one of first and second associated boats, wherein the first associated boat is substantially different from the second associated boat.
20. The boat lift apparatus as defined in claim 17, wherein the flexible non-water retaining boat sling includes a net for receiving and lifting the associated boat.
Type: Application
Filed: Oct 11, 2006
Publication Date: Dec 20, 2007
Inventors: Richard Bishop (Bradenton, FL), charles Bishop (Ballwin, MO)
Application Number: 11/548,490
International Classification: B63C 3/04 (20060101); B63C 3/06 (20060101);