Fluid handling – Systems – Multi-way valve unit
Reexamination Certificate
2011-04-12
2011-04-12
Schneider, Craig M (Department: 3753)
Fluid handling
Systems
Multi-way valve unit
C137S625690
Reexamination Certificate
active
07921878
ABSTRACT:
A control valve comprises a valve body having a fluid inlet and at least one work fluid outlet for supplying pressurized fluid to the fluid operated device. A valve member is movable in the valve body in a first direction from a null position to a full flow or open position for supplying flow of pressurized fluid from a feed passage to a work fluid outlet. The valve member has a load sense signal shaping device that provides for initial flow from the feed passage to the work fluid outlet through a metering orifice during movement of the valve member from the null position to the full flow open position so as to shape an initial boost pressure signal.
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Parker Hannifin Corporation
Renner , Otto, Boisselle & Sklar, LLP
Schneider Craig M
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