Fluid handling – Line condition change responsive valves – Fluid opened valve requiring reset
Reexamination Certificate
2007-12-25
2007-12-25
Rivell, John (Department: 3753)
Fluid handling
Line condition change responsive valves
Fluid opened valve requiring reset
C137S514500, C251S054000
Reexamination Certificate
active
11528738
ABSTRACT:
A reset relief valve with a body having an inlet port, an outlet port, and an interior wall partially defining an enclosed chamber, a piston disposed in the body and moveable between a first position at which the piston is disposed in fluid flow-blocking relationship between the inlet port and the outlet port of the body and a second position at which the piston is removed from that position, a piston having a head with opposed end surfaces one of which defines a portion of the enclosed chamber and at least one fluid flow passageway extending through the head and providing fluid communication between the enclosed chamber in the body, and a second chamber above a moveable disc in the piston. A preferred embodiment includes the crank assembly with cross bar support and a T-bar to prevent downward movement of the disc.
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patent: 7117885 (2006-10-01), Lazzara et al.
Cox Ernest F.
Lazzara Gerard S.
Rivell John
RR Valve, Inc.
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