ADJUSTABLE LIFTING ASSEMBLY FOR NAUTICAL VEHICLES
20220348298 · 2022-11-03
Inventors
Cpc classification
B66F9/12
PERFORMING OPERATIONS; TRANSPORTING
B63C3/06
PERFORMING OPERATIONS; TRANSPORTING
B60P3/1033
PERFORMING OPERATIONS; TRANSPORTING
International classification
Abstract
Pontoon forks are specifically designed for the marine industry to efficiently and safely lift and maneuver pontoon boats. The pontoon forks are engineered to lift tri-toons and pontoon boats of lengths up to and greater than twenty-eight feet. The forks can further accommodate weights of up to and greater than six-thousand pounds. Removable pockets included with the pontoon forks allow for the lifting and transport of pontoon boats of various sizes without having to have specialized equipment for each and every make and model of the pontoon boat. The pontoon forks are retrofit to fit specific forklifts already owned or easily acquired by marinas.
Claims
1. A lift assembly for a forklift or a mobile boat hoist capable of transporting nautical vehicles comprising: a pair of elongated forks having distal and proximate ends, said pair of elongated forks being oriented substantially parallel to one another; shafts passing through and connecting the pair of elongated forks to one another near the proximate ends; interchangeable pockets supporting an underside of said elongated pair of forks and configured to prevent movement between the pair of elongated forks and the shafts when moved in a locked, operative position.
2. The lift assembly of claim 1 further comprising at least two horizontally oriented rollers longitudinally dispersed throughout each fork of the pair of elongated forks to facilitate longitudinal movement of the nautical vehicles along said pair of elongated forks and to prevent damage to the nautical vehicles as the nautical vehicles are loaded onto the pair of elongated forks.
3. The lift assembly of claim 2 further comprising a wheel pin assembly with vertically oriented pins extending from an upper beam of the pair of elongated forks through the horizontally oriented pins to a lower beam of the elongated forks.
4. The lift assembly of claim 3 wherein the wheel pin assembly further comprises spacers or dampers that in combination with the vertically oriented pins bias the horizontally oriented rollers inwardly toward each other fork of the pair of elongated forks.
5. The lift assembly of claim 4 further comprising wheel pin mounting plates configured to fasten via nuts and bolts the wheel pin assembly to an upper surface of said upper beam or to a lower surface of said lower beam.
6. The lift assembly of claim 2 further comprising vertically oriented end rollers positioned at the distal ends of said pair of elongated forks.
7. The lift assembly of claim 1 wherein the forks are constructed from galvanized steel.
8. The lift assembly of claim 1 further comprising collars removably bolted to ends of the shafts.
9. The lift assembly of claim 1 wherein the pockets are removably bolted to the pair of elongated forks.
10. The lift assembly of claim 1 wherein the pair of elongated forks comprise parallelly oriented upper and lower beams, said upper and lower beams mechanically connected by a plurality of vertical spacers longitudinally dispersed through said pair of elongated forks.
11. The lift assembly of claim 1 wherein the pockets comprise L-brackets welded to an outer portion of an upper surface of said pockets, said L-brackets arranged in parallel relation, oriented to face away from one another, and positioned a distance slightly greater than a thickness of said pair of elongated forks.
12. The lift assembly of claim 11 further comprising reinforcements substantially surrounding a perimeter of said removable pockets toward the proximate ends of the forks, wherein a gap exists between a top, short reinforcement and a top, long reinforcement of said reinforcements, a distance of said gap being substantially equal to said distance between said L-brackets.
13. The lift assembly of claim 11 wherein the lower beams comprise apertures allowing the L-brackets to be fastened to said forks.
14. The lift assembly of claim 1 wherein the shafts pass through bushings allowing for rotational movement of the shafts.
15. A method of transporting a watercraft across land comprising: selectively securing removable pockets to forks of a forklift to determine a distance between said forks based upon a size of the watercraft; loading the watercraft onto the forks of the forklift; transporting said watercraft from a first location on land to a second location on land.
16. The method of claim 15 wherein the first location is an outdoor location at a marina and the second location is a rack housed within a boathouse at said marina.
17. The method of claim 16 further comprising: actuating the forks upward so as to lift the watercraft with the forklift; and extending the forks forward so as to facilitate unloading the watercraft onto the rack.
18. The method of claim 15 further comprising storing multiple watercrafts on the racks in close proximity to one another.
19. The method of claim 18 further comprising: removing the watercraft from storage; and extending the forks forward so as to facilitate unloading the watercraft onto a boat trailer or a boat hoist.
20. A pontoon fork comprising: parallelly oriented upper and lower beams each having a first and second end, said upper and lower beams mechanically connected by a plurality of vertical spacers longitudinally dispersed through said pair of elongated forks; apertures establishing a removable mechanical connection between the pontoon fork and adjustable pockets capable of supporting a lower surface of the lower beam; wherein a second vertical spacer of the plurality of vertical spacers is perforated so as to allow shafts connecting two or more pontoon forks to one another; horizontally oriented wheels longitudinally dispersed between said parallelly oriented upper and lower beams, said horizontally oriented wheels being staggered with at least some of said plurality of vertical spacers; vertically oriented wheels positioned at the second end of the upper beam; and an end cap positioned at the second end of the lower beam.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Several embodiments in which the present invention can be practiced are illustrated and described in detail, wherein like reference characters represent like components throughout the several views. The drawings are presented for exemplary purposes and may not be to scale unless otherwise indicated.
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[0060] An artisan of ordinary skill need not view, within isolated figure(s), the near infinite number of distinct permutations of features described in the following detailed description to facilitate an understanding of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
[0061] The present disclosure is not to be limited to that described herein. Mechanical, electrical, chemical, procedural, and/or other changes can be made without departing from the spirit and scope of the present invention. No features shown or described are essential to permit basic operation of the present invention unless otherwise indicated.
[0062] Referring now to the figures, an improved lift assembly 100 for a boat fork or a boat hoist and its components are shown at a high level in
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[0064] In particular,
[0065] The use of at least three noncollinear shafts 102 can better stabilize an operating position of the forks 101 such that there are substantially no axes and/or planes of movement about which the forks 101 will tend to easily buckle, shear, and/or otherwise fail when there exists extreme loads and moments placed upon same due to the weight of nautical vehicles.
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[0068] The rollers 112 and spacers 111 can secure to the forks 101 by a wheel pin plate 110 with apertures 117, 118 (see
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[0072] In lift assemblies 100 beneficially employing at least three connecting shafts 102, one or more of the vertical spacers 201 can be a perforated spacer 202. As shown, it is preferred the second vertical spacer 201 be a perforated spacer 202 with a brick-like shape with a large central aperture allowing for the third connecting shaft 102 to pass therethrough.
[0073] In some embodiments, the connecting shafts 102 can also pass-through bushings 203. The bushing 203, also known as a bush, can be an independent plain bearing inserted into the forks 101 and/or perforated spacers 202 to provide a bearing surface for rotary applications. The design of the bushing 203 can be solid (sleeve and flanged), split, clenched, and the like. A sleeve, split, or clenched bushing is a cylindrical sleeve of material with an inner diameter (“ID”), outer diameter (“OD”), and length. A solid sleeved bushing is solid all the way around, a split bushing has a cut along its length, and a clenched bearing is similar to a split bushing but with a clench (or clinch) across the cut connecting the parts. A flanged bushing is a sleeve bushing with a flange at one end extending radially outward from the OD. The flange is used to positively locate the bushing when it is installed or to provide a thrust bearing surface. A linear bushing does not need to be pressed into the forks 101 and/or perforated spacer 202, but rather can be secured with a radial feature. Two such examples include: (i) two retaining rings, or (ii) a ring that is molded onto the OD of the bushing that matches with a groove in the housing, thereby durably preventing forces acting on the bushing 203 to press the bushing 203 out of the member it is secured within.
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[0078] Also shown are lower beam bracket apertures 502 that correspond with the apertures 307/407 of the L-shaped brackets, which is shown in further detail in
[0079] Further shown in
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[0084] Boat forks 700 are found in marinas, boathouses, and other facilities housing nautical vehicles 800, as shown in
[0085] The boat fork 700 also features tall masts, heavy counterweights, and special paint to resist seawater-induced corrosion. Boat forks 700 are unique among most other forklifts in that they can also feature a negative lift cylinder. This type of cylinder allows can allow the forks 101 to actually descend lower than ground level. Such a functionality is often necessary because the ground upon which the boat fork 700 operates is higher than water levels below. Additionally, boat forks 700 can feature some of the longest forks 101 available, with some up to and greater than twenty-four feet long (e.g., eighteen feet, twenty feet, twenty-eight feet, thirty-two feet, etc.). The forks 101 are also typically coated in rubber to prevent damage to the hull of the boats that rest on them. Manufacturers of boat forks include the likes of Wiggins (Manchester, N.H.), Hoist (East Chicago, Ind.), and Toyota (Aichi, Japan).
[0086] An important aspect of the present invention is to mitigate instability in the boat fork 700 during operation. The boat fork 700 and load from the nautical vehicle 800 as a combination can continually vary center of gravity with every movement of the load. The boat fork 700 should thus be configured to never negotiate a turn at speed with a raised load, where centrifugal and gravitational forces may combine to cause a disastrous tip-over accident. The boat fork 700 can further be designed with a load limit for the forks 101 which is decreased with fork elevation and undercutting of the load from the nautical vehicle 800 (i.e., when a load does not butt against the fork 101). A loading plate for loading reference is usually located on the boat fork 700 alongside said information specifying a specified maximum weight and a specified forward center of gravity. The boat fork 700 can be fitted with safety equipment such as a cage.
[0087] Boat forks 700 can thus be an important tool to ensure smooth operations at a marina or a boathouse. When racking and untracking nautical vehicles 800, the boat fork 700 may need to travel inside a storage bay or a rack 900 that is more than one boat length deep. In some embodiments, drivers of the nautical forklift 700 can be guided into the rack 900 through guide rails on the floor and the pallet is placed on cantilevered arms or rails. These maneuvers are most easily completed with well-trained operators. Since unracking every nautical vehicle 800 typically requires the fork truck to enter the storage structure, damage is more common than with other types of storage. In designing a drive-in system, dimensions of the fork truck, including overall width and mast width, must be carefully considered. The present invention allows for optimal selection of these dimensions for the fork truck because the connecting shafts 102, collars 103, adjustable pockets 104, 105 of the improved lift assembly 100 can allow the distance between the forks 101 to be varied independently from the design of the fork truck. In other words, the dimensions of the fork truck can be optimized for safety in the most rigorous of applications and/or based upon the dimensions of the boathouse/marina, rather than varying between each and every application driven by vastly varying size of nautical vehicles.
[0088] In some embodiments, hydraulics of the boat fork 700 are controlled either with levers directly manipulating hydraulic valves or by electrically controlled actuators, using smaller “finger” levers for control. The latter allows more freedom in ergonomic design. To control, raise, and lower the forks 101, the operator of the boat fork 700 can tilt the mast to compensate for a nautical vehicle's tendency to angle the forks 101 toward the ground and risk the nautical vehicle 800 slipping off the forks 101. Tilt also provides a limited ability to operate on non-level ground.
[0089] The removable pockets 104, 105 can be selectively secured to the forks 101 of the boat fork 700 based upon a size of the nautical vehicle. In so doing, an optimal distance between said forks 101 will be determined. This better allows boat forks 700 to be used in combination with the lifting assembly 100 so as to lift the nautical vehicles 800 in and out of storage racks 900 (
[0090] For example, to unload a nautical vehicle 800 from the rack 900, the nautical vehicle 800 can be loaded onto the forks 101 (unloaded from the rack 900) of the boat fork 700 by actuating the forks 101 upward from below the base of the nautical vehicle 800 so as to lift the nautical vehicle 800 with the boat fork 700. The forks 101 can then be retracted at a substantially constant elevation toward the boat fork 700 until the forks 101 are substantially adjacent the boat fork 700. The forks 101 can then be actuated to a lower transport position so that the nautical vehicle 800 can be transported by the boat fork 700 from a first location on land to a second location on land.
[0091] Then, to load a nautical vehicle 800 back onto a rack 900 (presuming the nautical vehicle 800 has already been loaded onto forks 101), the forks 101 may first be actuated to an elevation just above where the nautical vehicle 800 will be stored. Then, the forks 101 can be extended forward until the nautical vehicle 800 is positioned adjacent to where the nautical vehicle 800 will be stored. The forks 101 can then be actuated downward until the load of the nautical vehicle 800 is released from the forks 101 and onto rack 900. The forks 101 are then ideally returned further download and retracted so as to be put into a transport without contacting the nautical vehicle 800. This will allow the boat fork 700 to be driven to other locations and to be use for other applications around (both inside and outside) the boathouse and/or marina.
[0092] The aforementioned techniques and actuation of said forks 101 will also allow the boat fork 700 to maneuver the nautical vehicle 800 onto a boat trailer 1000 (
[0093] From the foregoing, it can be seen that the present invention accomplishes at least all of the stated objectives.
LIST OF REFERENCE CHARACTERS
[0094] The following table of reference characters and descriptors are not exhaustive, nor limiting, and include reasonable equivalents. If possible, elements identified by a reference character below and/or those elements which are near ubiquitous within the art can replace or supplement any element identified by another reference character.
TABLE-US-00001 TABLE 1 List of Reference Characters 100 lift assembly 101 fork 102 connecting shaft 103 collar 104 left pocket 105 right pocket 106 connecting shaft bolt 107 locknut 108 washer 109 pocket bolt 110 wheel pin assembly(ies) 111 main roller spacer 112 horizontal roller 113 end roller spacer 114 wheel pin plate 115 horizontal roller male fastener 116 vertical roller bolt 117 vertical roller 118 collar aperture 119 wheel pin plate smaller aperture 120 wheel pin plate larger aperture 201 vertical spacer 202 perforated spacer 203 shaft bushing 204 wheel mounting plate 205 upper beam 206 lower beam 207 end cap 208 vertical spacer aperture 301 left pocket body 302 bottom reinforcement 303 side reinforcement 304 top short reinforcement 305 top long reinforcement 306 left pocket bracket 307 bracket apertures 401 right pocket body 402 bottom reinforcement 403 side reinforcement 404 top short reinforcement 405 top long reinforcement 406 right pocket bracket 407 bracket apertures 501 lower beam connecting shaft aperture 502 lower beam bracket apertures 503 lower beam first wheel plate aperture 504 lower beam second wheel plate aperture 505 lower beam distal angle 600 bolt angle 700 forklift 800 boat 900 rack 1000 boat trailer
GLOSSARY
[0095] Unless defined otherwise, all technical and scientific terms used above have the same meaning as commonly understood by one of ordinary skill in the art to which embodiments of the present invention pertain.
[0096] The terms “a,” “an,” and “the” include both singular and plural referents.
[0097] The term “or” is synonymous with “and/or” and means any one member or combination of members of a particular list.
[0098] The terms “invention” or “present invention” are not intended to refer to any single embodiment of the particular invention but encompass all possible embodiments as described in the specification and the claims.
[0099] The term “about” as used herein refer to slight variations in numerical quantities with respect to any quantifiable variable. Inadvertent error can occur, for example, through use of typical measuring techniques or equipment or from differences in the manufacture, source, or purity of components.
[0100] The term “substantially” refers to a great or significant extent. “Substantially” can thus refer to a plurality, majority, and/or a supermajority of said quantifiable variable, given proper context.
[0101] The term “generally” encompasses both “about” and “substantially.”
[0102] The term “configured” describes structure capable of performing a task or adopting a particular configuration. The term “configured” can be used interchangeably with other similar phrases, such as constructed, arranged, adapted, manufactured, and the like.
[0103] Terms characterizing sequential order, a position, and/or an orientation are not limiting and are only referenced according to the views presented.
[0104] “Portaging” is the practice of carrying watercraft or cargo over land, either around an obstacle in a river, or between two bodies of water. A path where items are regularly carried between bodies of water is also called a “portage.”
[0105] The “scope” of the present invention is defined by the appended claims, along with the full scope of equivalents to which such claims are entitled. The scope of the invention is further qualified as including any possible modification to any of the aspects and/or embodiments disclosed herein which would result in other embodiments, combinations, subcombinations, or the like that would be obvious to those skilled in the art.