Double-acting hydraulic press

Details Double-acting hydraulic press Double-acting hydraulic press

1980-11-05

1983-03-08

Hershkovitz, Abraham

Expansible chamber devices

Mutually relatively movable cylinder or sleeve, member...

Cylinder or sleeve forms working member

92 53, 92 65, 100269B, 4254512, 425590, F01B 720

Patent

active

043757812

ABSTRACT:
In a double-acting hydraulic press: an outer press ram having a cylinder formed therewithin for the piston of an inner press ram, the inner and outer ram cylinders in communication with one another and the rams being subject to a common hydraulic actuating means, each ram carrying a separate and distinct tool at its forward face, and means controllably feeding pressurized hydraulic fluid to an intermediate section of said inner ram cylinder, whereby to control the effective hydraulic force applied to said inner ram and the tool thereof.

REFERENCES:
patent: 2173358 (1939-09-01), Ernst
patent: 2646504 (1953-07-01), Gosline
patent: 2649693 (1953-08-01), Venus
patent: 3302535 (1967-02-01), Procter
patent: 3464263 (1969-09-01), Omandam, Sr.
patent: 3732784 (1973-05-01), Vogelei
patent: 3791262 (1974-02-01), Staehlin
patent: 4111629 (1978-09-01), Nussbaumer
patent: 4125059 (1978-11-01), Tuji

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