Fluid handling – Line condition change responsive valves – Bi-directional flow valves
Reexamination Certificate
2007-06-26
2007-06-26
Hepperle, Stephen M. (Department: 3753)
Fluid handling
Line condition change responsive valves
Bi-directional flow valves
C137S492500, C137S493200, C137S493700
Reexamination Certificate
active
11091187
ABSTRACT:
A relief valve assembly (27) for use with first (15) and second (21) conduits, one communicating high pressure. The assembly comprises a housing (29,33) defining first (45) and second (47) ports, and a poppet seat (49). A poppet member (43) and the housing define a spring chamber (55), and a spring (39) is disposed to bias the poppet member toward the seat. The poppet member defines a shuttle cavity (51), a shuttle passage (53) communicating from the cavity to the spring chamber, and the poppet defining a seat (57), and a fluid passage (61P) communicating with the first port, and a seat (59), and a second fluid passage (63) communicating with the second port. A shuttle valve assembly (71,73,75) is provided, whereby the fluid pressure in whichever of the ports is at lower pressure is communicated to the spring chamber and adds to the force of the biasing spring.
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Behm Brian W.
French Nathan H.
Huynh Tam C.
Jacobson Robert D.
Lodermeier Christopher M.
Eaton Corporation
Hepperle Stephen M.
Kasper K. J.
Weaver Sonu N.
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