Safety shut-off valve

Details Safety shut-off valve Safety shut-off valve

1978-05-31

1979-12-18

Weakley, Harold W.

Valves and valve actuation

With correlated flow path

With mounting or support

251 73, 137461, F16K 3102

Patent

active

041790979

ABSTRACT:
The invention is a pressure responsive shut-off valve including a valve housing that defines a fluid inlet and a fluid outlet separated by a valve seat. A valve closure accommodated by the valve seat moves between open and closed positions to control fluid flow between the inlet and outlet. Controlling the valve is a valve operator including a pressure responsive piston that moves between a set position in which the valve closure is separated from the valve seat and a release position in which the closure is seated on the seat to prevent fluid flow between the inlet and outlet. Retaining the piston is a cylinder body that defines an activating volume communicating with the inlet and establishing on one face of the piston a fluid pressure forcing the piston toward its release position, and a reference volume communicating with the inlet and establishing on the opposite face of the piston a reference volume. An internal seal isolates the inlet from the reference volume with the piston in its set position while allowing fluid communication therebetween with the piston in its release position. Maintaining the piston in the set position is a latching mechanism that, after activation of the piston to its release position by excessive pressure, can be restored by a manual reset.

REFERENCES:
patent: 2829861 (1958-04-01), Wright
patent: 3542052 (1970-11-01), Irwin
patent: 3989222 (1976-11-01), Yoshiyasu

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-451022