Hydraulic protection device for presses

Details Hydraulic protection device for presses Hydraulic protection device for presses

1976-07-09

1977-06-21

Lanham, C.W.

Metal deforming

With means to drive tool

Including yieldable connection in drive train to movable tool

83543, 100 53, B21J 902

Patent

active

040303365

ABSTRACT:
Hydraulic overload protection device for a press comprises a housing receiving therein a piston defining with this housing a space communicating via a check valve with a supply source and via a relief valve with a drain. This space additionally communicates with the drain via a line including an adjustable relief valve and a device for disconnecting the said space from the drain, when the movable member of the press, carrying a die, has been driven through the maximum length of its stroke. The disclosed protection device offers fine adjustment of the pressing or stamping effort and prolongs the service life of dies.

REFERENCES:
patent: 2616543 (1952-11-01), Danly
patent: 2681703 (1954-06-01), Croucher
patent: 2937733 (1960-05-01), Danly
patent: 3481171 (1969-12-01), Alexander
patent: 3583201 (1971-06-01), Topaz
patent: 3955396 (1976-05-01), Carrieri

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