An apparatus for transporting a load onto a raised surface includes: a frame; and rear, middle, and front wheel assemblies coupled to the frame. Each wheel assembly includes: at least one leg, at least one wheel rotatingly coupled to the leg for rollingly supporting the frame, and at least one actua
An apparatus for transporting a load onto a raised surface includes: a frame; and rear, middle, and front wheel assemblies coupled to the frame. Each wheel assembly includes: at least one leg, at least one wheel rotatingly coupled to the leg for rollingly supporting the frame, and at least one actuator operatively coupled to the at least one leg. The front wheel assembly is configured to extend forwardly from, and retract rearwardly toward, the frame. The actuators are configured to independently raise and lower the at least one rear, middle, and front wheel. A load support member is located below the frame and moveable between a first position where the center of gravity of the load is located rearward of an axis defined by the at least one middle wheel, and a second position where the center of gravity of the load is located forward of the axis.
대표청구항▼
1. An apparatus for transporting a load onto a raised surface, the load having a centre of gravity, the apparatus comprising: a) a frame;b) an adjustable rear wheel assembly coupled to the frame, the adjustable rear wheel assembly comprising: (i) at least one adjustable rear leg,(ii) at least one re
1. An apparatus for transporting a load onto a raised surface, the load having a centre of gravity, the apparatus comprising: a) a frame;b) an adjustable rear wheel assembly coupled to the frame, the adjustable rear wheel assembly comprising: (i) at least one adjustable rear leg,(ii) at least one rear wheel rotatingly coupled to a distal end of the at least one adjustable rear leg for rollingly supporting the frame, and(iii) at least one rear actuator operatively coupled to the at least one adjustable rear leg and configured to raise and lower the at least one rear wheel;c) a support rear wheel assembly coupled to the frame, the support rear wheel assembly comprising at least one rear support wheel for rollingly supporting the frame, the at least one rear support wheel positioned forward of the at least one rear wheel, the at least one rear support wheel defining a rear support axis;d) an adjustable front wheel assembly coupled to the frame, the adjustable front wheel assembly comprising: (i) at least one adjustable front leg,(ii) at least one front wheel rotatingly coupled to a distal end of the at least one adjustable front leg for rollingly supporting the frame, the at least one front wheel positioned forward of the at least one rear support wheel, the at least one front wheel defining a front axis, and(iii) at least one front actuator operatively coupled to the at least one adjustable front leg and configured to raise and lower the at least one front wheel;e) a support front wheel assembly coupled to the frame, the support front wheel assembly comprising: (i) at least one front support leg, and(ii) at least one front support wheel rotatingly coupled to a distal end of the at least one front support leg for rollingly supporting the frame, the at least one front support wheel positioned forward of the at least one front wheel; ande) a load support member for supporting the load, the load support member operatively coupled to the frame and moveable between an upper and a lower load support position, the load support member located below the frame and positioned so that the centre of gravity of the load being supported is located forward of the rear support axis and rearward of the front axis. 2. The apparatus of claim 1, wherein the at least one adjustable rear leg comprises a pair of adjustable rear legs extending downwardly from the frame, each adjustable rear leg of the pair of adjustable rear legs comprising an upper adjustable rear leg and a lower adjustable rear leg, the upper adjustable rear leg having an upper end coupled to the frame, the lower adjustable rear leg having an upper end coupled to the upper adjustable rear leg, and the lower adjustable rear leg having a lower end coupled to the rear wheel. 3. The apparatus of claim 2, wherein each upper adjustable rear leg comprises an elongate hollow member and each lower adjustable rear leg comprises an elongate member configured for telescoping movement within the hollow member, and wherein the at least one rear actuator is configured to move the lower adjustable rear leg relative to the upper adjustable rear leg. 4. The apparatus of claim 3, wherein each of the at least one rear actuator comprises a worm drive driven by an electric motor. 5. The apparatus of claim 3, wherein each of the at least one rear actuator comprises a hydraulic or pneumatic piston. 6. The apparatus of claim 3, wherein the at least one adjustable front leg comprises a pair of adjustable front legs extending downwardly from the frame, wherein each adjustable front leg in the pair of adjustable front legs comprises an upper adjustable front leg and a lower adjustable front leg, the upper adjustable front leg having an upper end coupled to the frame, the lower adjustable front leg having an upper end coupled to the upper adjustable front leg, and the lower adjustable front leg having a lower end coupled to the front wheel. 7. The apparatus of claim 6, wherein each upper adjustable front leg comprises an elongate hollow member and each lower adjustable front leg comprises an elongate member configured for telescoping movement within the hollow member, and wherein the at least one front actuator is configured to move the lower adjustable front leg relative to the upper adjustable front leg. 8. The apparatus of claim 7, wherein each of the at least one front actuator comprises a worm drive driven by an electric motor. 9. The apparatus of claim 7, wherein each of the at least one front actuator comprises a hydraulic or pneumatic piston. 10. The apparatus of claim 7, further comprising at least one load support track, wherein the load support member is slidingly coupled to the at least one load support track, and further comprising at least one load support actuator configured to selectively move the load support member between the upper load support position and the lower load support position. 11. The apparatus of claim 1, wherein the load support member is configured to support a pallet. 12. The apparatus of claim 11, wherein the load support member comprises at least two forks. 13. The apparatus of claim 1, wherein the apparatus is self-propelled. 14. The apparatus of claim 1, wherein when the load support member is in the upper load support position, the load is located substantially within an area defined by the pair of adjustable rear legs, the pair of adjustable front legs, and the frame.
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이 특허에 인용된 특허 (11)
Ivanchenko, Volodymyr, Apparatus for transporting an invalid.
Hglinger Norbert (Via Stazione ; 34 I-Caldaro (Bozen) ITX), Device for facilitating particularly the loading and unloading of containers etc. from vehicles etc..
Lutz David W. (P.O. Box 810 Carlisle PA 17013) Lutz David E. (P.O. Box 810 Carlisle PA 17013), Forklift truck capable of raising and lowering itself and a load back and forth between two surfaces at different levels.
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