Liquid purification or separation – Flow – fluid pressure or material level – responsive – Discharge of treated material
Reexamination Certificate
2006-03-07
2009-06-30
Cecil, Terry K (Department: 1797)
Liquid purification or separation
Flow, fluid pressure or material level, responsive
Discharge of treated material
C210S167050, C123S1960AB
Reexamination Certificate
active
07553408
ABSTRACT:
A vehicle hydraulic system includes a lube circuit, a pump supplying hydraulic fluid from sump to first and a second hydraulic control circuits and a filter circuit. The filter circuit includes a first outlet connected to the lube circuit, a sump line, and a second outlet connected to the pump. A suction filter is connected between the sump line and second outlet. A return filter is connected to the first control circuit outlet. A return line having an orifice is connected between the return filter and the first outlet. A backpressure valve has a member, an outlet connected to the second outlet, and an inlet and pilot line connected to the return filter outlet. A pressure sense line has one end connected to the return line between the orifice and the first outlet, and a second end connected to the member in opposition to the pilot line.
REFERENCES:
patent: 5614090 (1997-03-01), Breusch
patent: 5660726 (1997-08-01), Dluzik
patent: 5772868 (1998-06-01), Reinhardt
patent: 5972210 (1999-10-01), Münkel
patent: 6098752 (2000-08-01), McCaleb
patent: 6461262 (2002-10-01), Kashiwase
patent: 6790348 (2004-09-01), Orborn
patent: 6932902 (2005-08-01), Hirasawa et al.
Davison Scott E.
Durbin Brian Daniel
Nystrom Dwayne Alan
Rodeghiero Reno Antonio
Sigl David Leo
Cecil Terry K
Deere & Company
LandOfFree
Hydraulic lubrication filter circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Hydraulic lubrication filter circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic lubrication filter circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4128183