IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0490080
(2009-06-23)
|
등록번호 |
US-8096729
(2012-01-17)
|
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
2 인용 특허 :
6 |
초록
▼
An adjustable lift, such as a boat lift, or an adjustable apparatus mountable to a boat lift, comprising a frame supporting a keyway, a shaft and a screw along which a hub assembly travels. An axle may extend from the hub assembly and support a wheel, such that translation of the hub assembly along
An adjustable lift, such as a boat lift, or an adjustable apparatus mountable to a boat lift, comprising a frame supporting a keyway, a shaft and a screw along which a hub assembly travels. An axle may extend from the hub assembly and support a wheel, such that translation of the hub assembly along screw raises and lowers the wheel with respect to the frame members of the lift. In this way, the lift may be rolled into place, with its wheels then raised, so that frame members and/or feet of the lift rest on a lake bed or other surface. When wanting to move the lift, a user may rotate the screw in an opposite direction, lowering the wheel with respect to the frame member, freeing lift frame members and feet from the lake bed and allowing the user to roll the lift away.
대표청구항
▼
1. An apparatus for adjusting the height of a wheel relative to a member, comprising: a frame having a base, a first support extending from said base and a second support extending from said base and spaced from said first support;a screw extending between said first and second supports, said screw
1. An apparatus for adjusting the height of a wheel relative to a member, comprising: a frame having a base, a first support extending from said base and a second support extending from said base and spaced from said first support;a screw extending between said first and second supports, said screw rotatable within said first and second supports, said screw having an end with torque transmitting surfaces for rotating said screw;a hub assembly movable between said first and second supports, said hub assembly threadingly engaged with said screw; andan axle coupleable to said hub for mounting a tire to said apparatus. 2. An apparatus according to claim 1, further comprising: a shaft coupled to said base, said first support, and said second support and slidably engaged with said hub assembly. 3. An apparatus according to claim 2, further comprising: a keyway coupled to, and positioned between, said base and said shaft. 4. An apparatus according to claim 1, further comprising: a bushing in at least one of said first and second supports, wherein said screw rotatably engages said bushing. 5. An apparatus according to claim 1, wherein said hub assembly includes a hub and a spindle, said hub having a first bore for receiving said screw and a second bore for receiving said spindle, further wherein said spindle includes a bore for receiving said screw. 6. An apparatus according to claim 1, further comprising: a mounting plate spaced from said frame. 7. An apparatus according to claim 6, wherein said mounting plate has a plurality of openings for receiving a first plurality of fasteners and a second plurality of openings for receiving a second plurality of fasteners, and further wherein said first and second pluralities of fasteners removably couple to said base for mounting to said frame member. 8. An apparatus for adjusting the height of a wheel mounted to a member of a boat lift, comprising: a frame having a base, a first support and a second support extending generally normal to said base, said base having a plurality of pairs of openings spaced proximate opposite sides of said base;a keyway and a shaft, said keyway abutting said base and said shaft coupled to said keyway, said keyway and said shaft extending between said first and second supports along a central plane of said base;a screw spaced from said shaft and extending between said first and second supports along a central plane of said base;a hub assembly slidably engaged with said keyway and said shaft, and threadingly engaged with said screw;said hub assembly including a hub and a spindle at least partially embedded in said hub;said hub assembly further including a protrusion at an end of said hub for coupling an axle to said hub assembly; anda plate for mounting said base to said member, said member located between said base and said plate. 9. An apparatus according to claim 8, further comprising: a tire rotatably coupled to said axle. 10. An apparatus according to claim 9, wherein said tire has a width substantially equal to a length of said axle. 11. An apparatus according to claim 8, further comprising: a plurality of pairs of openings proximate opposing sides of said plate; anda plurality of fasteners having shanks sized to pass through said plurality of pairs of openings in said plate and through a respective plurality of pairs of openings in said base. 12. An apparatus according to claim 8, further comprising; a bushing in each of said first and second supports that rotatably engage opposite ends of said screw. 13. An apparatus according to claim 8, said screw having an end with a generally cylindrical portion for engaging a bushing mounted in one of said first and second supports and a generally hexagonal portion having torque transmitting surfaces for rotating said screw. 14. A boat lift comprising: a lift frame comprising a plurality of lift frame members, including a plurality of generally parallel members;a plurality of wheel frames coupled to said lift frame, wherein at least one wheel frame is coupled to one of said generally parallel members and at least a second wheel frame is coupled to a second one of said generally parallel members;each of said wheel frames comprising a screw threadingly engaged with a hub assembly, each hub assembly coupled to an axle supporting a wheel;wherein rotating said screw changes a height of a respective wheel relative to a respective wheel frame. 15. A boat lift according to claim 14, wherein said screw has a generally hexagonal portion for engaging a torque transmitting tool. 16. A boat lift according to claim 14, each of said wheel frames further coupled to a shaft, said hub assembly slidable along said shaft. 17. A boat lift according to claim 16, each of said wheel frames and said shafts coupled to a respective keyway, said hub assembly slidable along said keyway. 18. A boat lift according to claim 14, wherein each of said wheel frames comprises a base and a plurality of supports extending generally normal to said base. 19. A boat lift according to claim 18, further comprising a shaft fixedly coupled to said base and said plurality of supports, said hub assembly slidable along said shaft.
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