Hydraulic press

Details Hydraulic press Hydraulic press

1977-02-28

1978-11-14

Lanham, C.W.

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

7245308, B21J 912

Patent

active

041250109

ABSTRACT:
A hydraulic press which includes at least one cylinder piston unit for selectively displacing a punch. The cylinder piston unit includes at least one working chamber which communicates with a reversible continuously operating working pressure medium supplier having a variable output. At least one action stroke pressure unit is operatively connected to the punch and acts upon the same only during a segment of the motion of the punch in an action stroke direction. The action stroke pressure unit is temporarily connected to a pressure medium source having a higher pressure than the pressure produced by the pressure medium supplier.

REFERENCES:
patent: 2380153 (1945-07-01), Davis
patent: 2594204 (1952-04-01), Nowak
patent: 3158046 (1964-11-01), Steinfort
patent: 3173286 (1965-03-01), Dischler
patent: 3507143 (1970-04-01), Georg

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