Pallet jack having width-adjustable fork prongs
First Claim
Patent Images
1. A pallet jack adapted for lifting and moving a pallet comprising:
- a frame;
a wheeled truck pivotally coupled to the frame;
an extensible jack mounted intermediate the wheeled truck and the frame and adapted for raising and lowering the frame relative to the wheeled truck;
a left-side prong including a proximal end and a distal end, including a load roller mounted to said prong proximate said distal end;
a left-side prong bracket shiftably connecting said proximal end of said left-side prong for translational movement along said frame;
a right-side prong including a proximal end and a distal end, including a load roller mounted to said prong proximate said distal end;
a right-side prong bracket shiftably connecting said proximal end of said right-side prong for translational movement along said frame;
said frame including a drive member operative for simultaneously shifting said left-side and right-side prongs alternately toward and away from each other in a shifting direction while maintaining said left-side prong substantially parallel to said right-side prong and both of said prongs substantially perpendicular to said shifting direction.
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0 Petitions
Accused Products
Abstract
A pallet jack includes a frame and a pair of outwardly projecting load prongs connected to the frame. The proximal ends of the prongs are connected to a horizontal member on the rear of the frame by brackets that keep the prongs out of the frame proper. A threaded rod is mounted horizontally on the horizontal member and is threaded into the proximal end of each prong, with the two ends of the threaded rod having opposite hand threads. The threaded rod is rotated by a user turning a crank mounted on top of the frame and connected to the adjustment threaded rod by a chain drive, allowing the width between the prongs to be adjusted inwardly or outwardly.
68 Citations
7 Claims
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1. A pallet jack adapted for lifting and moving a pallet comprising:
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a frame; a wheeled truck pivotally coupled to the frame; an extensible jack mounted intermediate the wheeled truck and the frame and adapted for raising and lowering the frame relative to the wheeled truck; a left-side prong including a proximal end and a distal end, including a load roller mounted to said prong proximate said distal end; a left-side prong bracket shiftably connecting said proximal end of said left-side prong for translational movement along said frame; a right-side prong including a proximal end and a distal end, including a load roller mounted to said prong proximate said distal end; a right-side prong bracket shiftably connecting said proximal end of said right-side prong for translational movement along said frame; said frame including a drive member operative for simultaneously shifting said left-side and right-side prongs alternately toward and away from each other in a shifting direction while maintaining said left-side prong substantially parallel to said right-side prong and both of said prongs substantially perpendicular to said shifting direction. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification