Pumps – With condition responsive pumped fluid control – Pressure responsive relief or bypass valve
Patent
1995-03-31
1996-11-05
Thorpe, Timothy S.
Pumps
With condition responsive pumped fluid control
Pressure responsive relief or bypass valve
417311, 417417, F04B 4900
Patent
active
055709990
ABSTRACT:
Disclosed is an electromagnetic pump, in which oil is exhausted not intermittently but constantly with small pressure fluctuations, with reduced operational noise, with reduced fire-extinction delay, and improved energy efficiency. The electromagnetic pump has an automatic exhaust-control valve having a conical head, and a cylindrical body having a tapered shape whose diameter decreases rearward from the conical head. According to change of a sectional area of an oil path defined between the exhaust-control valve and an exhaust chamber, the exhaust-control valve transmits an elevated pressure of pressurized oil to a development section to thereby automatically control its pressure elevating capability.
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patent: 4255094 (1981-03-01), Nomura
patent: 4431381 (1984-02-01), Falendysz et al.
patent: 4620562 (1986-11-01), Pacht
patent: 4955408 (1990-09-01), Meermoller
patent: 5165871 (1992-11-01), Iwabuchi
Daewoo Electronics Co. Ltd.
Kim Ted
Thorpe Timothy S.
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