Power plants – Pressure fluid source and motor – With control means for structure storing work driving energy
Patent
1977-10-12
1979-03-06
Geoghegan, Edgar W.
Power plants
Pressure fluid source and motor
With control means for structure storing work driving energy
60416, 91420, F15B 102, F15B 300
Patent
active
041423682
ABSTRACT:
A hydraulic system for supplying hydraulic fluid to a hydraulically operated device alternately at pressures of different values, said system comprising a first hydraulic circuit arranged to be supplied with hydraulic fluid at a low pressure by a pump and for supplying the hydraulic device with fluid at said low pressure through a pilot operated valve, a second hydraulic circuit provided with a pressure multiplier piston device which produces hydraulic fluid at a pressure greater than that of the low pressure fluid and having a first chamber connected to the first hydraulic circuit and a second chamber of smaller area than the first chamber connected to the second hydraulic circuit, the second hydraulic circuit being provided with a pressure accumulator for maintaining high pressure in the second hydraulic circuit and said second hydraulic circuit being provided with a second pilot operated valve for supplying the hydraulic device with fluid at said high pressure.
REFERENCES:
patent: 2839895 (1958-06-01), Hemeon
patent: 3779017 (1973-12-01), Fujisawa et al.
patent: 3986437 (1976-10-01), Lioux
Geoghegan Edgar W.
Striker Michael J.
Welko Industriale S.p.A.
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