Regulated valve assembly for fire extinguishing systems

Details Regulated valve assembly for fire extinguishing systems Regulated valve assembly for fire extinguishing systems

2005-04-13

2011-12-20

Fristoe, Jr., John (Department: 3753)

Valves and valve actuation

Fluid actuated or retarded

Pilot or servo type motor

C169S019000, C251S025000, C251S031000

Reexamination Certificate

active

08079567

ABSTRACT:
A valve assembly has a valve body having an inlet section for a pressurized fluid and an outlet. A piston is movable within the valve body between an open position and a closed position blocking fluid communication. The piston has an end section, a sealing section and a middle section located between the end section and the sealing section. A cavity receives the piston within the valve body. The cavity has a superior chamber, an intermediate chamber, and an inferior chamber. A spring within the superior chamber exerts a spring force onto the piston to urge the piston towards the open position. An actuator device provides upon actuation for a first flow of fluid outside the cavity from the inlet section to the superior chamber. The first flow causes a pressure within the superior chamber to increase until it is about the same as the pressure within the container so that the spring force moves the piston to the open position. In the open position a main flow of fluid flows from the inlet section via the intermediate chamber to the outlet.

REFERENCES:
patent: 2111230 (1938-03-01), Toussaint
patent: 2398775 (1946-04-01), Beekley et al.
patent: 3980270 (1976-09-01), Thomas
patent: 4516600 (1985-05-01), Sturman et al.
patent: 5653291 (1997-08-01), Sundholm
patent: 6871802 (2005-03-01), Stilwell et al.
patent: 7134447 (2006-11-01), Boyer
patent: WO 2004/079678 (2004-09-01), None

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