Valve for a hydraulic drive apparatus

Details Valve for a hydraulic drive apparatus Valve for a hydraulic drive apparatus

2005-08-30

2005-08-30

Morris, Lesley D. (Department: 3611)

Motor vehicles

Having four wheels driven

Including pump and fluid motor, or generator and electric...

C180S305000

Reexamination Certificate

active

06935454

ABSTRACT:
An improved valve for use in a hydrostatic drive apparatus for a vehicle such as a zero turn vehicle. For each hydraulic drive system in the vehicle, a valve is located between the high and low pressure sides of the closed hydraulic circuit connecting the hydraulic pump and motor. The valve opens when the pressure rise rate in the high pressure side reaches a set level to minimize pressure spikes in the high pressure side and thus improve performance of the vehicle. A valve block may be used to mount the valve, and a second valve may also be included therein to connect the two pressure sides of the hydraulic circuit in a similar manner when the vehicle is operated in reverse.

REFERENCES:
patent: 3126707 (1964-03-01), Hann et al.
patent: 3522999 (1970-08-01), Liles
patent: 4494624 (1985-01-01), Scheuerle et al.
patent: 4915126 (1990-04-01), Gyllinder
patent: 4948092 (1990-08-01), Kasper et al.
patent: 5282363 (1994-02-01), Ogawa et al.
patent: 5333451 (1994-08-01), Sakikawa et al.
patent: 5412948 (1995-05-01), Komura et al.
patent: 5542384 (1996-08-01), Rosenmann et al.
patent: 5546752 (1996-08-01), Horton et al.
patent: 5632467 (1997-05-01), Just et al.
patent: 5687468 (1997-11-01), Hans
patent: 5850886 (1998-12-01), Kouno et al.
patent: 5957229 (1999-09-01), Ishii
patent: 6045116 (2000-04-01), Wilke et al.
patent: 6056074 (2000-05-01), Heal et al.
patent: 6073444 (2000-06-01), Horton et al.
patent: 6079957 (2000-06-01), Jirele
patent: 6196348 (2001-03-01), Yano et al.
patent: 6209675 (2001-04-01), Hayashi et al.
patent: 6295811 (2001-10-01), Mangano et al.
patent: 6397966 (2002-06-01), Irikura et al.
patent: 6401854 (2002-06-01), Yano et al.
patent: 6457546 (2002-10-01), Ishimaru et al.
patent: 6722464 (2004-04-01), Nakatani et al.
patent: 6749037 (2004-06-01), Lindholdt
Circle Seals Controls, Inc., “100 Series Check Valves 0 to 25 PSIG,” brochure, Circle Seals Controls, Inc. (Corona, California), p. 1-2.
Circle Seal Controls, Inc., “200 Series 0 to 3,000 PSIG H200 Series 0 to 6,000 PSIG Check Valves,” brochure.
The Lee Company, “Lee Cheks,” web site information brochure, (Mar. 15, 2002).
The Lee Company, “Lee Pressure Relief Valves How to select the right Relief Valve for your application,” Article, (Mar. 15, 2002).
Kepner Products Company, “Check Valves,” web stie product information, (Mar. 15, 2002).
Kepner Products Company, “Relief Valves,” web site information, Kepner Products Company.

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