IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0840018
(1997-04-24)
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발명자
/ 주소 |
- Osborn
- Jr. Thomas H.
- Gann Virgil D.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
4 인용 특허 :
2 |
초록
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This invention provides an apparatus and a method of using the apparatus to lift and transport a bulky load, such as a round bale of hay. The apparatus of the invention is a planar frame equipped with sliding block adapted to contact and maintain the load to be lifted against the frame during lift a
This invention provides an apparatus and a method of using the apparatus to lift and transport a bulky load, such as a round bale of hay. The apparatus of the invention is a planar frame equipped with sliding block adapted to contact and maintain the load to be lifted against the frame during lift and transport. The frame is further equipped with a cable and associated sheave and attachment means adapted to cause the sliding block to move or not to move relative to the frame upon movement of the frame relative to a support, such as the ground depending upon the method of anchoring the cable. The frame is still further equipped with sites adapted for lifting/rotatable attachment to a 3-point lifting device, such as a farm tractor, having the capability to lift the apparatus and load. The frame and load, upon being lifted by the 3-point lifting device, can either tilt toward or away from the 3-point lifting device or can rise vertically depending the method of attachment of the apparatus to the 3-point lifting device.
대표청구항
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[ Having thus described the invention that which is claimed is:] [1.] A method of lifting a load, said method being comprised of the steps of:providing a planar frame having a front side and a back side, said frame being comprised of a left side rail, a right side rail, a top rail, a bottom rail, a
[ Having thus described the invention that which is claimed is:] [1.] A method of lifting a load, said method being comprised of the steps of:providing a planar frame having a front side and a back side, said frame being comprised of a left side rail, a right side rail, a top rail, a bottom rail, a load support rail positioned in the plane of said frame intermediate said left side rail and said right side rail, a load handling assembly, a guide pivot assembly and a load connector assembly;said left side rail of said frame having a first outer surface, a first inner surface and a first lift pin attached to said left side rail;said right side rail of said frame having a second outer surface, a second inner surface and a second lift pin attached to said right side rail;said load support rail comprises a front side, a back side, an upper end, and a lower end wherein said front side of said load support rail and said front side of said frame face in the same direction, said lower end of said load support rail is perpendicular and rigidly attached to said bottom rail of said frame, and said upper end of said load support rail has an opening therein between said front side and said back side and is rigidly attached to said top rail of said frame;said load handling assembly, comprising a load mover having attached thereto a load carrier and a load attachment means, is slidably connected to said front side of said load support rail; andsaid guide pivot assembly, comprising at least one guide pin plate having removably connected thereto a guide pin, is fixedly attached to said back side of said load support rail at a position intermediate said bottom rail of said frame and said opening in said load support rail;said load connector assembly, comprising a flexible member having an anchor end and a load end, is positioned to extend from said front side of said load support rail to said back side of said load support rail by passing through said opening with said load end being connected to said load attachment means of said load handling assembly;providing a first lift arm having a first end and a second end; a second lift arm having a first end and a second end; and a guide arm having a first end and a second end;rotatably attaching said first end of said first lift arm to a first fixed pivot located in a first horizontal plane;rotatably attaching said first end of said second lift arm to a second fixed pivot, wherein said second fixed pivot is located in said first horizontal plane at a fixed distance from said first fixed pivot and further wherein the perpendicular distance in said first horizontal plane from said first fixed pivot to any plane perpendicular to said first horizontal plane is equal to the perpendicular distance in said first horizontal plane from said second fixed pivot to said plane perpendicular to said first horizontal plane;rotatably attaching said first end of said guide arm to a third fixed pivot located in a second horizontal plane, wherein said second horizontal plane is parallel to and vertically above said first horizontal plane and further wherein the distance from said first fixed pivot to said third fixed pivot is equal to the distance from said second fixed pivot to said third fixed pivot;positioning said planar frame in intersecting relationship with said first horizontal plane and said second horizontal plane with said back side of said frame facing said first fixed pivot, said second fixed pivot and said third fixed pivot;rotatably attaching said second end of said first lift arm to said first lift pin;rotatably attaching said second end of said second lift arm to said second lift pin;rotatably attaching said second end of said guide arm to said guide pin;attaching said anchor end of said flexible connector to a fixed anchor;supporting said load on said load carrier;applying upward forces to said first lift pin and said second lift pin wherebysaid first lift pin and said second lift pin are caused to rotate about said first fixed pivot and said second fixed pivot by said first lift arm and said second lift arm, and said guide pin is caused to rotate about said third fixed pivot by said guide arm, to thereby cause said load support rail to rise against said flexible connector in said opening, andsaid flexible connector, being restrained from movement by a fixed anchor, causes said load handling assembly to vertically lift said load by an amount less than, equal to or greater than the vertical lift of said first and said second lift pins.
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