Fluid handling – Line condition change responsive valves – Direct response valves
Reexamination Certificate
2007-04-24
2007-04-24
Rivell, John (Department: 3753)
Fluid handling
Line condition change responsive valves
Direct response valves
C137S517000
Reexamination Certificate
active
10115000
ABSTRACT:
A pressure switch or valve for a hydraulic circuit that responds primarily to fluid flow as opposed to relying strictly on a pressure gradient across the valve. A T-shaped valve has a stem portion disposed within an opening in a reservoir or other fluid passage. The valve is spring biased in an open position. A valve head has an area significantly larger than an area of the opening. As fluid flows around the edge of the valve head, the fluid speed increases and induces a pressure gradient across the valve head to overcome the spring bias and close the valve. The valve may be employed in a wall surface of the reservoir or fluid passage having an area significantly larger than the valve head.
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Berenato White & Stavish
Torque-Traction Technologies, LLC.
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