Overload protector for mechanical press

Details Overload protector for mechanical press Overload protector for mechanical press

1976-04-27

1978-04-25

Feldman, Peter

Presses

Portable receptacle lid applying

With gathering of contents

192150, B30B 1528

Patent

active

040856690

ABSTRACT:
An overload protector for mechanical press comprises a cylinder chamber formed in the mechanical actuating chain of the press, and filled with incompressible fluid; a safety valve which relieves the fluid from the chamber when the chain receives an overload, and which includes a relief route containing a pilot valve part and main valve part in series. The pilot valve part is arranged to close the route at the outlet of the passage penetrating the valve member of the main valve part therethrough, and to be opened by the pressure of the fluid when above the setting pressure for relief. The valve member of the main valve part is arranged to be moved for opening the route by the difference between the pressures acting thereon from both sides connected by the passage when the pilot valve part is opened.

REFERENCES:
patent: 3426873 (1969-02-01), Tezuka
patent: 3955396 (1976-05-01), Carrieri

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