Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Reexamination Certificate
2007-12-11
2007-12-11
Lazo, Thomas E. (Department: 3745)
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
C060S422000, C091S447000
Reexamination Certificate
active
11315188
ABSTRACT:
A hydraulic control apparatus is provided to prevent failure that can occur due to hunting, to elevate performance of a hydraulic control valve, and to improve operation efficiency by effectively conducting bleed off. The hydraulic control apparatus can include a first change over valve group that can include a change over valve connected with a first delivery line associated with the variable capacity pump, and arranged to have load sensing function. A second change over valve group can also be provided, and can include at least one change over valve connected with a second delivery line associated with the variable capacity pump. An open and close motion valve and a compensation valve can be configured to constitute a pressure compensation flow control means connected through the second delivery line and the second change over valve group.
REFERENCES:
patent: 6082106 (2000-07-01), Hamamoto
patent: 6318079 (2001-11-01), Barber
patent: 6978607 (2005-12-01), Matsumoto et al.
patent: 196 39 772 (1998-04-01), None
patent: 699 18 803 (2005-08-01), None
patent: 10 2004 005 606 (2005-10-01), None
patent: 0516864 (1992-12-01), None
patent: 11311204 (1999-11-01), None
patent: 2002-029405 (2002-01-01), None
patent: 2002-295405 (2002-10-01), None
Aoki Kazumichi
Kobayashi Masayuki
DLA Piper (US) LLP
Lazo Thomas E.
Toshiba Kikai Kabushiki Kaisha
LandOfFree
Hydraulic control apparatus 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 control apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic control apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3832868