Motors: expansible chamber type – With motive fluid valve
Reexamination Certificate
2004-03-19
2009-02-10
Kershteyn, Igor (Department: 3745)
Motors: expansible chamber type
With motive fluid valve
C091S445000, C091S446000
Reexamination Certificate
active
07487706
ABSTRACT:
The present invention relates to an arrangement for controlling a hydraulically driven motor (2), forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a main duct (1) in which the motor is connected. The motor is adapted to drive a load with varying loading, and one or more valves (6, 7) are adapted for controlling the hydraulic fluid flow through the motor on the one hand during operation and on the other hand for starting and stopping of the motor. One of the valves consists of a flow control valve (7) which is connected in the main duct (1) downstream of the motor (2) and is adapted for on the one hand starting/stopping of the motor and on the other hand constant flow control of the hydraulic fluid flow through the motor.
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Copending U.S. Appl. No. 10/549,736, filed Sep. 19, 2005, Per-Ola Vallebrant.
Copending U.S. Appl. No. 10/549,728, filed Sep. 19, 2005, Per-Ola Vallebrant.
Sannelius Mikael
Vallebrant Per-Ola
Kershteyn Igor
Parker-Hannifin Corporation
Whitman Daniel J.
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