Power plants – Pressure fluid source and motor – Pulsator
Patent
1975-06-12
1976-11-09
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
Pulsator
60540, 92 12, 92134, F15B 700
Patent
active
039902404
ABSTRACT:
A method of controlling the advance and retraction of a tool on a processing machine in dependence of mechanical properties of the workpiece which tool communicates hydraulically on one hand with a drive means and on the other hand via a shut-off member on by-passes, with a pressure converter, the closing or opening of the shut-off member taking place through electrical pulses of a pressure measuring element, the pressure produced during the flow of the pressure fluid through an adjusting valve being kept constant, increasing, or decreasing for respective time periods each, the setting of the adjusting valve being operated by a pressure control for producing constant increasing, or decreasing pressure, and the pressure produced by the pressure converter and causing the retraction of the tool starting immediately after completion of its advance and being kept uniform, and an apparatus for carrying out the method.
REFERENCES:
patent: 706688 (1902-08-01), Reynders et al.
patent: 2716395 (1955-08-01), Pettigrew et al.
patent: 2733691 (1956-02-01), Johnson
patent: 2852965 (1958-09-01), Wallace
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