IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0785958
(2010-05-24)
|
등록번호 |
US-8371427
(2013-02-12)
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발명자
/ 주소 |
|
출원인 / 주소 |
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인용정보 |
피인용 횟수 :
1 인용 특허 :
10 |
초록
▼
A portable ramp for non-wheeled cargo such as, but not limited to, a personal watercraft, designed to assist the movement of cargo in and out of a truck or trailer bed. The invention is both light weight and collapsible for easy portability and stow ability. The invention consists of a composition o
A portable ramp for non-wheeled cargo such as, but not limited to, a personal watercraft, designed to assist the movement of cargo in and out of a truck or trailer bed. The invention is both light weight and collapsible for easy portability and stow ability. The invention consists of a composition of parts that facilitate quick assembly and disassembly. A plurality of square hollow tube rails, a plurality of center masts, a connection sleeve and a plurality self-braking wheels assist in the conveyance of cargo uphill with free spinning wheels and slow the cargo's movement downhill by engaging the wheels into a friction pad. The invention uses a wire cable that runs along the bottom of the said rails to strengthen the assembled ramp. This wire cable has adjustable tension and is engaged by extending the center mast downward creating a triangle shape.
대표청구항
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1. A portable loading and unloading ramp comprising: a plurality of rails each comprising a plurality of wheel wells in a top surface of the rails, the plurality of rails coupled parallel to each other with at least one of a center mast connection sleeve, a mooring plate assembly, and a resting bloc
1. A portable loading and unloading ramp comprising: a plurality of rails each comprising a plurality of wheel wells in a top surface of the rails, the plurality of rails coupled parallel to each other with at least one of a center mast connection sleeve, a mooring plate assembly, and a resting block;a plurality of wire cable assemblies, wherein each one of the plurality of wire cable assemblies is coupled to an underside of a different one of the plurality of rails on a first end of the rail and on a second end of the rail opposite the first end;a plurality of center masts, wherein each one of the plurality of center masts is hingedly coupled to the underside of a different one of the plurality of rails such that when the center mast is extended outward substantially perpendicular to the underside of the rail, the center mast exerts tension on wire cable assembly coupled to the respective rail of the plurality of rails;a plurality of movable axles, each one of the plurality of axles movably coupled to one of the plurality of rails across a different one of the plurality of wheel wells, wherein each one of the plurality of axles moves bilaterally responsive to movement of cargo on the ramp;a plurality of wheels, each one of the plurality of wheels rotatably mounted to a different one of the plurality of axles and at least partially within a different one of the plurality of wheel wells, each of the plurality of wheels rotatable independent of each other of the plurality of wheels; anda plurality of friction pads each removably coupled to the top surface of at least one of the plurality of rails, each of the plurality of friction pads substantially perpendicular to the top surface of the at least one of the plurality of rails and at least partially within the at least one of the plurality of rails at a different one of the plurality of wheel wells. 2. The portable loading and unloading ramp of claim 1, wherein each of the plurality rails comprises a first hollow rail and a second hollow rail telescopically coupled together with an internal sleeve. 3. The portable loading and unloading ramp of claim 2, wherein the center mast connection sleeve is coupled between the center masts. 4. The portable loading and unloading ramp of claim 3, further comprising a plurality of center mast connection sleeve receivers, wherein a portion of the center mast connection sleeve is inserted into the plurality of center mast connection sleeve receivers and braces the assembly from forces of torsion. 5. The portable loading and unloading ramp of claim 1, wherein the plurality of center masts each comprise a cable guide and a roller that allows movement of the center mast along the respective wire cable assembly when the center mast is extended outward from the underside of the respective rail. 6. The portable loading and unloading ramp of claim 1, wherein each of the plurality of wire cable assemblies comprise at least one of adjustable tension wire connection hardware, turnbuckles, and removable connection fasteners. 7. The portable loading and unloading ramp of claim 6, wherein tension on each of the plurality of wire cable is adjustable. 8. A portable ramp, comprising: at least two rails coupled parallel to each other, each of the at least two rails comprising a first end, a second end opposite the first end, and a plurality of wheel well openings in a top surface of the rails;a plurality of axles each movably coupled to opposing sides of one of the rails within a different one of the plurality of wheel well openings, each of the plurality of axles movable between a first position closer to the first end of the rail and a second position closer to the second end of the rail;a plurality of friction pads each removably coupled substantially perpendicular to the top surface of the respective rail and adjacent to a different one of the plurality of wheel well openings between the axle corresponding to the one of the plurality of wheel well openings and the second end of the respective rail; anda plurality of a wheels each rotatably coupled to a different one of the plurality of axles and partially housed within the respective rail, each of the plurality of wheels responsive to move the axle to the first position when cargo on the respective wheel moves towards the first end of the respective rail and responsive to move the axle to the second position and engage with the respective friction pad when cargo on the respective wheel moves toward the second end of the respective rail. 9. The portable ramp of claim 8, wherein each one of the at least two rails comprises two hollow rails removably coupled together and the portable ramp further comprises: at least two center masts, each of the at least two center masts hingedly coupled to a different one of the at least two rails on a side of the respective rail opposite the wheel well opening such that each of the at least two center masts pivots between a first mast position parallel to the at least two rails and a second mast position perpendicular to the at least two rails; andat least two wire cables, each of the at least two wire cables coupled the first end and the second end of a different one of the at least two rails, wherein when the center mast is in the second position the respective wire cable is taught against an end of the center mast opposite the rail. 10. The portable ramp of claim 9, wherein the two hollow rails of each of the rails are removably coupled together with an internal sleeve. 11. The portable ramp of claim 10, further comprising: a center mast connection sleeve removably coupled to the at least two center masts between the at least two center masts;a mooring plate assembly removably coupled to the second ends of the at least two rails; anda resting block removably coupled to the first ends of the at least two rails. 12. The portable ramp of claim 11, wherein each of the center masts comprises a center mast connection sleeve receiver that allows the center mast connection sleeve to slidably engage with the center masts. 13. The portable ramp of claim 12, wherein each of the center masts comprises a roller on the end of the center mast opposite the rail configured to roll along the respective wire cable when the center mast is extended to the second position. 14. The portable ramp of claim 13, further comprising two axle slots on opposing sides of each wheel well opening, wherein the two axle slots are substantially parallel to the top plane of the respective rail and are sized to house at least a portion of one of the plurality of movable axles. 15. The portable ramp of claim 14, wherein the mooring plate comprises two perpendicular walls and two sleeves extending from one of the two perpendicular walls, and wherein each of the two sleeves of the mooring plate is sized to fit within a different one of the two rails and located on the one of the two perpendicular walls to align with the one of the two rails. 16. The portable ramp of claim 15, further comprising at least one detent pin inserted through at least one of the two rails and the two sleeves of the mooring plate. 17. A portable ramp, comprising: at least two rails coupled parallel to each other, each of the at least two rails comprising a first end, a second end opposite the first end, and a plurality of wheel well openings on a top surface of the rails;a plurality of movable axles each adjacent to a different one of the plurality of wheel well openings and movably coupled to opposing sides of the respect rails between a first position closer to the first end of the rail and a second position closer to the second end of the rail;a plurality of friction pads each removably coupled to the top surface of a different one of the plurality of wheel well openings and positioned between the axle and the second end of the respective rail; anda plurality of wheels each rotatably coupled to a different one of the plurality of axles and partially housed within the respective rail, each of the plurality of wheels responsive to move with the respective axle between the first position and the second position and engage with the respective friction pad when the axle is in the second position. 18. The portable ramp of claim 17, further comprising: a mooring plate assembly coupled to the first ends of the two rails; anda resting block coupled to the second ends of the two rails. 19. The portable ramp of claim 18, wherein each of the plurality of friction pads are positioned perpendicular to a top plane of the respective rail and each end of each of the axles is movably coupled within a slot parallel to the top plane of the respective rail.
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