Hydraulic press

Details Hydraulic press Hydraulic press

1985-09-26

1986-11-25

Bray, W. D.

Metal deforming

With means to drive tool

Including pneumatic- or fluid-actuated tool support

7245312, 91171, 91515, 100 46, 100258A, B21J 918

Patent

active

046241264

ABSTRACT:
A hydraulic press having at least two cylinders adapted for providing relative displacement between the upper and lower platens of a hydraulic press, each cylinder being in fluid communication with only one chamber of a multiple chamber hydraulic system utilizing a common ram operating through all chambers, the ram portion in each chamber having a predetermined ratio of area of the ram in the direction of actuation to volume of hydraulic fluid within its chamber to provide equal find displacement in each chamber or movement of the ram.

REFERENCES:
patent: 3635074 (1972-01-01), Moos et al.
patent: 4341106 (1982-07-01), Hackett

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