Motors: expansible chamber type – With motive fluid valve – Relatively movable serial valves
Reexamination Certificate
2007-04-17
2007-04-17
Leslie, Michael (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
Relatively movable serial valves
C091S454000
Reexamination Certificate
active
11117385
ABSTRACT:
A hydraulic system having a source of pressurized fluid and a fluid actuator with a first chamber and a second chamber. The hydraulic system also has a first valve configured to selectively fluidly communicate the source with the first chamber and a second valve configured to selectively fluidly communicate the source with the second chamber. The hydraulic system also has a supply passageway and a signal passageway each disposed between the first and second valves in parallel. The hydraulic system also has a proportional pressure compensating valve configured to control a pressure of a fluid directed between the source and the first and second valves. The hydraulic system further has a fluid passageway disposed between the supply and signal passageways to fluidly communicate the supply and signal passageways.
REFERENCES:
patent: 3366202 (1968-01-01), James
patent: 4046270 (1977-09-01), Baron et al.
patent: 4222409 (1980-09-01), Budzich
patent: 4250794 (1981-02-01), Haak et al.
patent: 4316486 (1982-02-01), Tandrup et al.
patent: 4416187 (1983-11-01), Nystrom
patent: 4437385 (1984-03-01), Kramer et al.
patent: 4480527 (1984-11-01), Lonnemo
patent: 4581893 (1986-04-01), Lindbom
patent: 4586330 (1986-05-01), Watanabe et al.
patent: 4623118 (1986-11-01), Kumar
patent: 4662601 (1987-05-01), Andersson
patent: 4706932 (1987-11-01), Yoshida et al.
patent: 4711267 (1987-12-01), Schwelm
patent: 4747335 (1988-05-01), Budzich
patent: 4799420 (1989-01-01), Budzich
patent: 5137254 (1992-08-01), Aardema et al.
patent: 5152142 (1992-10-01), Budzich
patent: 5211196 (1993-05-01), Schwelm
patent: 5287794 (1994-02-01), Andersson
patent: 5297381 (1994-03-01), Eich et al.
patent: 5313873 (1994-05-01), Gall et al.
patent: 5350152 (1994-09-01), Hutchison et al.
patent: 5366202 (1994-11-01), Lunzman
patent: 5447093 (1995-09-01), Budzich
patent: 5477677 (1995-12-01), Krnavek
patent: 5537818 (1996-07-01), Hosseini et al.
patent: 5553452 (1996-09-01), Snow et al.
patent: 5568759 (1996-10-01), Aardema
patent: 5678470 (1997-10-01), Koehler et al.
patent: 5701933 (1997-12-01), Lunzman
patent: 5813226 (1998-09-01), Krone et al.
patent: 5813309 (1998-09-01), Taka et al.
patent: 5857330 (1999-01-01), Ishizaki et al.
patent: 5868059 (1999-02-01), Smith
patent: 5878647 (1999-03-01), Wilke et al.
patent: 5890362 (1999-04-01), Wilke
patent: 5947140 (1999-09-01), Aardema et al.
patent: 5960695 (1999-10-01), Aardema et al.
patent: 6009708 (2000-01-01), Miki et al.
patent: 6026730 (2000-02-01), Yoshida et al.
patent: 6082106 (2000-07-01), Hamamoto
patent: 6216456 (2001-04-01), Mitchell
patent: 6367365 (2002-04-01), Weickert et al.
patent: 6397655 (2002-06-01), Stephenson
patent: 6408622 (2002-06-01), Tsuruga et al.
patent: 6467264 (2002-10-01), Stephenson et al.
patent: 6502393 (2003-01-01), Stephenson et al.
patent: 6502500 (2003-01-01), Yoshino
patent: 6516614 (2003-02-01), Knoll
patent: 6598391 (2003-07-01), Lunzman et al.
patent: 6619183 (2003-09-01), Yoshino
patent: 6655136 (2003-12-01), Holt et al.
patent: 6662705 (2003-12-01), Huang et al.
patent: 6691603 (2004-02-01), Linerode et al.
patent: 6694860 (2004-02-01), Yoshino
patent: 6715402 (2004-04-01), Pfaff et al.
patent: 6718759 (2004-04-01), Tabor
patent: 6725131 (2004-04-01), Lunzman
patent: 6732512 (2004-05-01), Pfaff et al.
patent: 6748738 (2004-06-01), Smith
patent: 6761029 (2004-07-01), Linerode
patent: 2003/0121256 (2003-07-01), Mather
patent: 2003/0121409 (2003-07-01), Lunzman et al.
patent: 2003/0125840 (2003-07-01), Lunzman et al.
patent: 2003/0196454 (2003-10-01), Jensen et al.
patent: 2004/0055288 (2004-03-01), Pfaff et al.
patent: 2004/0055289 (2004-03-01), Pfaff et al.
patent: 2004/0055452 (2004-03-01), Tabor
patent: 2004/0055453 (2004-03-01), Tabor
patent: 2004/0055454 (2004-03-01), Pfaff et al.
patent: 2004/0055455 (2004-03-01), Tabor et al.
patent: 2006/0090460 (2006-05-01), Ma et al.
patent: 02613041 (1997-05-01), None
U.S. Appl. No. 11/117,384, filed Apr. 29, 2005.
Egelja Aleksandar M.
Lehmann Robert Scot
Ma Pengfei
Sorokine Michael A.
St. Germain Gene Richard
Caterpillar Inc
Finnegan Henderson Farabow Garrett & Dunner
Leslie Michael
Shin Caterpillar Mitsubishi Ltd
LandOfFree
Hydraulic system having a pressure compensator 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 system having a pressure compensator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic system having a pressure compensator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3764770