Vane pump with a bypass valve and passage arrangement for...

Details Vane pump with a bypass valve and passage arrangement for... Vane pump with a bypass valve and passage arrangement for...

2005-04-12

2005-04-12

Tyler, Cheryl J. (Department: 3746)

Pumps

With condition responsive pumped fluid control

Pressure responsive relief or bypass valve

C417S440000, C417S079000, C417S080000, C417S083000, C417S088000, C417S089000

Reexamination Certificate

active

06877961

ABSTRACT:
In a housing of a pump apparatus having a flow control valve to discharge a part of excess fluid in a deviated slanting way to a bypass pass11, a pair of suction paths19, 19′ is formed opposite to end portions119, 119′ of the bypass path11to send operation fluid to suction ports of the pump apparatus. A dividing wall is equipped at opening portions of said pair of suction paths19, 19′ to distribute the operation fluid to each of suction paths19, 19′. A cross sectional area of one of said opening portions in a side of a direction of said deviated slanting way is smaller than a cross sectional area of the other of said opening portions in an opposite side of the deviated slanting way to relatively restrict a flow of said operation fluid in said one of opening portions.

REFERENCES:
patent: 3439623 (1969-04-01), Dietrich et al.
patent: 5170626 (1992-12-01), Ohtaki et al.
patent: 5822988 (1998-10-01), Kato
patent: 6287094 (2001-09-01), Bleitz et al.
patent: 6299418 (2001-10-01), Honaga et al.
patent: 6604913 (2003-08-01), Koyama et al.
patent: 6742996 (2004-06-01), Ueda et al.
patent: 0 505 033 (1992-09-01), None
patent: 5-96483 (1993-04-01), None

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