Parallel gripper

Details Parallel gripper Parallel gripper

1988-05-20

1990-01-09

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hook, hoistline, or grab type

Locking device

2941191, 901 37, B25J 1508

Patent

active

048923443

ABSTRACT:
In this parallel gripper suitable for gripping a work for a robot or the like, in which a pair of fingers are opened and closed by keeping the parallel condition between them by the transmission of the driving force of a fluid pressure actuator to the fingers by means of a power transmission mechanism, use is made of a pair of pistons, that are relatively slidable in a single cylinder bore under the action of fluid pressure, as the fluid pressure actuator, thereby obtaining substantially twice as large gripping force as in the case of empolying a single piston. Further, simplification in constitution and reduction in weight of the parallel gripper are achieved by constructing the gripper so as to supply a pressurized fluid to the pressure chamber formed between the pair of pistons in the cylinder bore, and by transmitting the driving force of both pistons that are driven in the mutually opposite directions to the fingers by means of a simple power transmission mechanism which employs levers as its principal components.

REFERENCES:
patent: 4569549 (1986-02-01), Nakashima et al.
patent: 4577898 (1986-03-01), Nusbaumer et al.
patent: 4593948 (1986-06-01), Borcea et al.
patent: 4607873 (1986-08-01), Nusbaumer et al.
patent: 4629237 (1986-12-01), Ito
patent: 4707013 (1987-11-01), Vranish et al.
patent: 4729588 (1988-03-01), Kratzer

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