Work holders – With fluid means – Cylinder-piston means directly moves jaw
Patent
1988-06-27
1989-08-08
Schmidt, Frederick R.
Work holders
With fluid means
Cylinder-piston means directly moves jaw
91462, 921711, 269 30, B23Q 308
Patent
active
048545635
ABSTRACT:
A movable carriage of a support unit is guided via bearing surfaces along a base. A double acting piston and cylinder unit is formed within a bore located in the base. A piston divides the cylinder into front and rear chambers and a piston rod thereof extends through the rear end of the cylinder and is connected to the carriage for movement therewith parallel thereto. A first pressure fluid connection extends through the front end of the cylinder into the front chamber. The bore has a sleeve, the outer surface of which partly defines a channel extending along the exterior of the cylinder. A second fluid pressure connection is also arranged at the front end of the cylinder, but it communicates with the channel to communicate with the rear cylinder chamber.
REFERENCES:
patent: 254741 (1882-03-01), Walsh
patent: 965807 (1910-07-01), Garvey
patent: 1865434 (1932-07-01), Eggert
patent: 2403427 (1946-07-01), Ludeman
patent: 3237252 (1966-03-01), Ratcliffe
patent: 3632102 (1972-01-01), Sessody
patent: 3727772 (1973-04-01), Pauls
Hartman Judy J.
Schmidt Frederick R.
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