Control device for a hydraulic cylinder for maintaining the pull

Details Control device for a hydraulic cylinder for maintaining the pull Control device for a hydraulic cylinder for maintaining the pull

1983-11-15

1985-11-19

Look, Edward K.

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

60419, F16D 3102

Patent

active

045533911

ABSTRACT:
A hydrostatic machine having a fixed displacement volume which is connected to the operating chamber of a hydraulic cylinder which machine is mechanically coupled to a second hydrostatic machine having a variable displacement volume to control the force exerted by the hydraulic cylinder. When control liquid is displaced from the working chamber of the cylinder the first machine acting as a motor drives the second machine which displaces control liquid into an accumulator. Vice versa, liquid is taken from the accumulator and the second machine acting as a motor drives the first machine which feeds liquid into the working chamber. The pressure in the working chamber, or, respectively, the force exerted by the cylinder is maintained constant by a corresponding adjustment of the displacement volume of the second machine.

REFERENCES:
patent: 2928376 (1960-03-01), Levetus
patent: 3626695 (1971-12-01), Jonsson
patent: 4026107 (1977-05-01), Kosek et al.

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