Oil circulation retention system and method

Details Oil circulation retention system and method Oil circulation retention system and method

2004-08-03

2008-08-19

Fenstermacher, David M (Department: 3682)

Lubrication

Systems

With lubricant treatment means

C384S392000, C384S399000

Reexamination Certificate

active

07413054

ABSTRACT:
A bearing lubrication (oil circulation) system having a check valve configuration for preventing overflow of an oil reservoir or tank. The pressurized oil circulation system may comprise a pump that pressurizes oil from the tank and circulates the oil through a supply conduit to a bearing, and returns the oil to the tank through a return conduit. The system may include a check valve disposed in the supply conduit and a pilot-operated check valve disposed in the return conduit. The pilot may be taken from the supply conduit upstream of the check valve disposed on the supply conduit. When pressure is discharged from the oil circulation, such as with shutdown of a circulation pump, the check valves automatically close and thus prevent oil contained in the supply and return conduits from draining (i.e., by gravity) to the oil tank. Therefore, flooding of the oil tank with excessive oil is prevented. Furthermore, loss of oil from the bearing sump is also prevented.

REFERENCES:
patent: 3906717 (1975-09-01), Matthews
patent: 3960245 (1976-06-01), Weinrich
patent: 5733048 (1998-03-01), El-Ibiary et al.
patent: 6230680 (2001-05-01), Pirone
patent: 6264003 (2001-07-01), Dong et al.
patent: 6374950 (2002-04-01), Takeno
patent: 2002/0046905 (2002-04-01), Hulkkonen et al.
patent: 2006/0054404 (2006-03-01), El-Ibiary
“The New Dodge® Oil Level and Filtration System,” Dodge/Reliance Magazine, vol. 14, pp. 22-23 (2002),available athttp://www.dodge-reliance.com/literature/magazine/volume14.htm.

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