Press

Details Press Press

1978-03-31

1979-05-22

Wilhite, Billy J.

Presses

Reciprocating press construction

Fluid pressure actuation

100270, B30B 108

Patent

active

041553004

ABSTRACT:
A press arrangement which includes a press ram selectively displaceable in a working stroke direction by at least one hydraulically actuated, double-acting cylinder piston unit with an auxiliary drive arrangement being provided for displacing the press ram in an idle stroke preceding a working stroke. The auxiliary drive arrangement bypasses the at least one cylinder piston unit and acts on the press ram. The auxiliary drive arrangement may be constructed as a toothed rack-and-pinion arrangement, a linearly double-acting pressure medium drive, or may include an electric linear motor acting on the press ram.

REFERENCES:
patent: 905601 (1908-12-01), Sperber
patent: 3938362 (1976-02-01), Falk

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