Power plants – Pressure fluid source and motor – Condition responsive control of pump or motor displacement
Patent
1991-04-22
1992-04-07
Look, Edward K.
Power plants
Pressure fluid source and motor
Condition responsive control of pump or motor displacement
60452, 60447, 91436, 91461, F16D 3102
Patent
active
051016281
ABSTRACT:
An energy regenerative circuit in a hydraulic apparatus wherein when a direction control valve is at the actuator unloaded-side chamber acting position, the discharge fluid line of a variable displacement pump is connected to a fluid tank via the direction control valve, by-pass fluid line change-over valve and by-pass fluid line that has a signal orifice. The by-pass fluid line is connected to a capacity control mechanism of the variable displacement pump via a signal fluid line on the upstream side of the signal orifice. The loaded-side chamber of the actuator is so connected that the pressurized fluid thereof is partly added through the direction control valve to the fluid line through which the pressurized fluid discharged from the variable displacement pump is fed to the loaded-side chamber. A first pilot valve is connected to the loaded-side chamber via a control fluid line having orifice and is controlled by the pressurized fluid of the loaded-side chamber, the control fluid line being connected to a fluid tank via a return fluid line that is opened and closed by a second pilot valve.
REFERENCES:
patent: 3906840 (1975-09-01), Bianchetta et al.
patent: 3935706 (1976-02-01), Stevens
patent: 4065922 (1978-01-01), Ott et al.
patent: 4293001 (1981-10-01), Budzich
patent: 4534707 (1985-08-01), Mitchell
patent: 4738103 (1988-04-01), Tha
patent: 4967557 (1990-11-01), Izumi et al.
Look Edward K.
Mattingly Todd
Shin Caterpillar Mitsubishi Ltd.
LandOfFree
Energy regenerative circuit in a hydraulic 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 Energy regenerative circuit in a hydraulic apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energy regenerative circuit in a hydraulic apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1887068