Presses – Reciprocating press construction – With plunger return cushioning
Patent
1983-09-16
1985-06-18
Wilhite, Billy J.
Presses
Reciprocating press construction
With plunger return cushioning
100289, B30B 118
Patent
active
045235210
ABSTRACT:
A spindle press in which a lubricant is displaced by relative movement of the threaded spindle and the ram displaced thereby, at least on a return stroke of the ram effected by a fluid operated jack. According to the invention, the press is provided with a control piston which blocks the lubricant flow as the ram approaches a deadpoint position at the end of its return stroke so as to enable the lubricant trapped between the spindle and the ram to damp the end of the return stroke.
REFERENCES:
patent: 2857157 (1958-10-01), Bonquet
patent: 4030336 (1977-06-01), Grigorenko et al.
patent: 4207763 (1980-06-01), Huydts et al.
Dubno Herbert
G. Siempelkamp GmbH & Co.
Ross Karl F.
Wilhite Billy J.
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