Selectively pressurized tank for hydraulic fluid

Details Selectively pressurized tank for hydraulic fluid Selectively pressurized tank for hydraulic fluid

1976-08-18

1978-05-16

Croyle, Carlton R.

Pumps

One fluid pumped by contact or entrainment with another

Liquid pumped by supplying or exhausting gaseous motive...

417199R, 417313, F04F 106

Patent

active

040896218

ABSTRACT:
A tank for oil or other hydraulic fluid is kept under a few pounds of air pressure during operation to keep air from being drawn into the fluid and to aid its flow to the pump. The pressure is provided dependably and quickly by a small air pump driven whenever the hydraulic pump is driven. A bleed-off discharge causes prompt dissipation of the pressure on shutdown so as not to cause oil leakage while the associated hydraulic pump is idle. The hydraulic level is below the pump shaft level so there will be no leakage by gravity.

REFERENCES:
patent: 2288437 (1942-06-01), Conery et al.
patent: 2362586 (1944-11-01), Ruth
patent: 2935078 (1960-05-01), Greenland et al.
patent: 3091929 (1963-06-01), Hipp
patent: 3278030 (1966-10-01), Rosaen

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