Combined check valve and pressure relief valve

Details Combined check valve and pressure relief valve Combined check valve and pressure relief valve

2006-04-18

2006-04-18

Krishnamurthy, Ramesh (Department: 3753)

Fluid handling

Line condition change responsive valves

Direct response valves

C137S512300, C137S513500, C137S493600, C137S540000, C251S284000

Reexamination Certificate

active

07028708

ABSTRACT:
A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.

REFERENCES:
patent: 807269 (1905-12-01), Hildebrand
patent: 2393589 (1946-01-01), Compton et. al.
patent: 3856041 (1974-12-01), Cryder et al.
patent: 4637430 (1987-01-01), Scheffel et al.
patent: 4648369 (1987-03-01), Wannenwetsch
patent: 4926902 (1990-05-01), Nakamura et al.
patent: 4948092 (1990-08-01), Kasper et al.
patent: 5002088 (1991-03-01), Engelhardt et al.
patent: 5479978 (1996-01-01), Zenkich
patent: 5546752 (1996-08-01), Horton et al.
patent: 5632467 (1997-05-01), Just et al.
patent: 5687468 (1997-11-01), Hans et al.
patent: 5778925 (1998-07-01), Cooke
patent: 5950669 (1999-09-01), Fehlmann et al.
patent: 6045116 (2000-04-01), Willke et al.
patent: 6073444 (2000-06-01), Horton et al.
Circle Seals Controls, Inc., “100 Series Check Valves 0 to 25 PSIG,” brochure, Circle Seals Controls, Inc. (Corona, California), p. 1-2.
Circle Seal Controls, Inc., “200 Series 0 to 3,000 PSIG H200 Series 0 to 6,000 PSIG Check Valves,” brochure.
The Lee Company, “Lee Cheks,” web site information brochure, (Mar. 15, 2002).
The Lee Company, “Lee Pressure Relief Valves How to select the right Relief Valve for your application,” Article, (Mar. 15, 2002).
Kepner Products Company, “Check Valves,” web site product information, (Mar. 15, 2002).
Kepner Products Company, “Relief Valves,” web site product information, Kepner Products Company.

Affiliated with

Also associated with

Rating

Combined check valve and pressure relief valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Combined check valve and pressure relief valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Combined check valve and pressure relief valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3562556