Press overload protection system

Details Press overload protection system Press overload protection system

1974-10-11

1976-05-11

Lanham, C. W.

Metal deforming

With means to drive tool

Including yieldable connection in drive train to movable tool

100 53, 137115, B21D 5500

Patent

active

039553965

ABSTRACT:
A hydraulic pressure actuated fluid flow control circuit is connected to a press actuated overload cylinder and piston assembly. The fluid flow circuit including the cylinder and piston assembly are charged to a given pressure, and upon an overload on the press the cylinder and piston assembly operate to increase fluid pressure in the circuit. The circuit includes a high response fluid pressure actuated relief valve operable in response to such increase in system pressure to dump system fluid in a manner whereby the entire system pressure is released so as to accelerate opening of the relief valve and dumping of the system fluid.

REFERENCES:
patent: 1560135 (1925-11-01), Bell
patent: 1808606 (1931-06-01), Pels
patent: 2891497 (1932-06-01), Treer
patent: 2936055 (1960-05-01), Kassnel
patent: 3481171 (1969-12-01), Alexander
patent: 3583201 (1971-06-01), Topaz
patent: 3693506 (1972-09-01), McMillen

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