Hydraulic actuator

Details Hydraulic actuator Hydraulic actuator

1992-04-24

1993-08-10

Yost, Frank T.

Cutlery

Perforating or indenting implements

Hand-guided, motor-driven

30358, 30228, 836391, B26F 100, B26F 302, B26B 1500, B26D 512

Patent

active

052337499

ABSTRACT:
A hydraulic puncher comprises a cylindrical casing, a pump unit including a pump and fixedly held in the casing, a cylinder chamber defined by the cylindrical inner face and the inner end face of the pump unit, a piston reciprocatingly and slidably provided in the cylinder chamber and an oil reservoir which is formed adjacent to the pump unit in the casing and from which the pump sucks operating oil filled within the cylindrical casing.

REFERENCES:
patent: 3626445 (1971-12-01), Penix
patent: 3693254 (1972-09-01), Salonen
patent: 3924330 (1975-12-01), Mitsuhashi et al.
patent: 4022096 (1977-05-01), Forichon
patent: 4088048 (1978-05-01), Olsson
patent: 4825755 (1989-05-01), Takano
patent: 4998351 (1991-03-01), Hartmeister

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