Material or article handling – Elevator or hoist and loading or unloading means therefor – Grab
Patent
1978-12-18
1980-06-24
Paperner, L. J.
Material or article handling
Elevator or hoist and loading or unloading means therefor
Grab
294DIG2, 414621, 414786, 414911, B66F 918
Patent
active
042092809
ABSTRACT:
A load-handling clamp for lift trucks having load-engaging, nonresilient contact pad surfaces specially textured for resisting slippage of the load variably depending on direction of slip. Each load-engaging surface of the contact pads is constructed of a nonresilient material, preferably metal, in which is formed a series of spaced parallel grooves, each having beveled longitudinal edges and lands therebetween, extending generally parallel to the direction of travel of the lift truck. The provision of the grooves and their orientation with respect to the lift truck provide a load-engaging surface having minimal resistance to slippage between pad and load in the direction of travel of the lift truck during engagement of the load by the clamp, but much greater resistance to slippage perpendicular to the grooves for holding the load. In addition, the surface is exceptionally resistant to wear and to clogging with bits of paper or cardboard from the loads handled.
REFERENCES:
patent: 2589101 (1952-03-01), Leguillon et al.
patent: 2812089 (1957-11-01), Purpura
patent: 2815878 (1957-12-01), Vance
patent: 3410431 (1968-11-01), Vik
Cascade Corporation
Paperner L. J.
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