Device for gripping a workpiece

Details Device for gripping a workpiece Device for gripping a workpiece

1996-04-04

1998-05-26

Kramer, Dean

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

294 864, 2941191, 901 37, B25J 1508

Patent

active

057554757

ABSTRACT:
A device for moving members into engagement with a workpiece includes a housing having surfaces for defining a chamber and first and second pistons located in the chamber movable toward and away from each other. A first connector connects the first piston to a member movable into engagement with the workpiece and extends through a first opening in the housing. A second connector connects the second piston to another member movable into engagement with the workpiece and extends through a second opening in the housing. Fluid pressure is applied to opposite sides of the first and second pistons to move the first and second pistons toward and away from each other. Debris is removed from the first and second openings in the housing through which the first and second connectors extend.

REFERENCES:
patent: 3289485 (1966-12-01), Cazalis et al.
patent: 4591199 (1986-05-01), Zajac
patent: 4735452 (1988-04-01), Nemoto
patent: 4802815 (1989-02-01), Funabashi et al.
patent: 4836048 (1989-06-01), Torii et al.
patent: 4913481 (1990-04-01), Chin et al.
patent: 4972731 (1990-11-01), Akutagawa et al.
patent: 5000652 (1991-03-01), Christensen et al.
patent: 5054834 (1991-10-01), Alessandri et al.
patent: 5529359 (1996-06-01), Borcea et al.

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