Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Reexamination Certificate
2007-07-31
2010-06-01
Leslie, Michael (Department: 3745)
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
Reexamination Certificate
active
07726125
ABSTRACT:
A hydraulic circuit is disclosed. The hydraulic circuit may have a variable displacement pump. The variable displacement pump may have a fluidic displacement control configured to vary a flow of pressurized fluid based on a fluid signal and an electronic displacement control configured to vary the flow of pressurized fluid based on an electronic signal. The flow of pressurized fluid may be controlled by the one of the fluidic and electronic displacement controls that requests the smallest flow of pressurized fluid. The hydraulic circuit may also have a control valve connected between the pump and the fluidic displacement control, and the control valve may be configured to transmit the fluid signal to the fluidic displacement control. The hydraulic circuit may further have a controller configured to transmit a fluid signal to cause the fluidic control to request a maximum flow of pressurized fluid, and transmit an electronic signal requesting a flow smaller than the maximum flow, which causes the electronic displacement control to vary the flow of pressurized fluid.
REFERENCES:
patent: 4463558 (1984-08-01), Miller et al.
patent: 5235809 (1993-08-01), Farrell
patent: 5765594 (1998-06-01), Collins et al.
patent: 5993168 (1999-11-01), Erkkilae et al.
patent: 6029445 (2000-02-01), Lech
patent: 6082107 (2000-07-01), Schniederjan et al.
patent: 6725105 (2004-04-01), Francis et al.
patent: 6757992 (2004-07-01), Berger et al.
patent: 6763661 (2004-07-01), Tabor et al.
patent: 7415822 (2008-08-01), Harber et al.
patent: 2006/0099081 (2006-05-01), Toda et al.
patent: 2007/0039457 (2007-02-01), Vigholm et al.
Brinkman Jason L.
Kuehn Jeffrey L.
Caterpillar Inc.
Finnegan Henderson Farabow Garrett & Dunner
Leslie Michael
LandOfFree
Hydraulic circuit for rapid bucket shake out 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 circuit for rapid bucket shake out, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hydraulic circuit for rapid bucket shake out will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4243717