Overload safety device in hydraulic forming presses, in particul

Details Overload safety device in hydraulic forming presses, in particul Overload safety device in hydraulic forming presses, in particul

1980-05-01

1981-10-13

Crosby, Gene P.

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

100 46, 100258A, B21J 920

Patent

active

042941032

ABSTRACT:
An overload safety device for a hydraulic press of the type in which a parallel linkage is mounted on the moveable beam to ensure normal accurate alignment if constituted by an operating rod mounted preferably on the transverse connecting rod of the parallel linkage in order to operate limit switches in accordance with longitudinal dimension changes due to compressive or tensile forces in this connecting rod arising from asymmetrical load. The operating rod can be arcuate and mounted at each end on the connecting rod or can be straight and mounted at one end only. Flexing of the arcuate rod or relative movement of the free end of the straight rod can be magnified by a mechanical linkage with an arm operating the limit switches.

REFERENCES:
patent: 2343167 (1944-02-01), Bench
patent: 2377007 (1945-05-01), Hess
patent: 2565639 (1951-08-01), Waldie
patent: 2594204 (1952-04-01), Nowak
patent: 3195449 (1965-07-01), Jureit
patent: 4157066 (1979-06-01), Pretty

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