Automatic shutoff valve

Details Automatic shutoff valve Automatic shutoff valve

2007-06-19

2007-06-19

Hepperle, Stephen M. (Department: 3753)

Fluid handling

Line condition change responsive valves

Safety cut-off requiring reset

C137S498000

Reexamination Certificate

active

10855074

ABSTRACT:
An automatic shutoff valve is provided. The valve is preferably constructed of a check valve (which is normally shut) and a shutoff valve which is open during static, no-flow, operation. Upon initiation of flow, even a drip flow, the check valve opens, and the pressure differential from the inlet to the outlet causes a piston in the shutoff valve to move toward a shut position. As long as the pressure differential stops before the piston closes, the shutoff valve resets to the fully open position. However, if the shutoff valve shuts, it preferably must be manually reset.

REFERENCES:
patent: 2346223 (1944-04-01), Lyon et al.
patent: 4471803 (1984-09-01), Ollivier
patent: 4522229 (1985-06-01), Van de Moortele
patent: 4535797 (1985-08-01), Rosaen
patent: 4732190 (1988-03-01), Polselli
patent: 4736889 (1988-04-01), Stephenson
patent: 5261442 (1993-11-01), Kingsford et al.
patent: 5967173 (1999-10-01), Kingsford et al.
patent: 6202683 (2001-03-01), Smith
MPR Engineering Services, Advanced Control Technology for Ruptures and Leaks using Smart Valves, Publications/Issue #7, 3 pages, printed from Internet site http://www.mpr.com/.

Affiliated with

Also associated with

Rating

Automatic shutoff 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 Automatic shutoff valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic shutoff valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3819212