Patent ID: 11946550
Assignee: WEED INSTRUMENT COMPANY, INC.
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G  Y | IPC F

Claim 12:
13. A method of providing passive overpressure protection, the method comprising:
coupling to a pressure line a passive overpressure protective device including:
a valve body having a first valve port, a second valve port, an interior passage communicating between the first and second valve ports, and a valve having an open condition in which pressure is communicated between the first and second valve ports and a closed condition in which pressure is not communicated between the first and second valve ports;
a valve stem mechanically coupled to the valve; and
a vacuum-filled bellows mechanically coupled to the valve stem, such that movement of the bellows responsive to an ambient pressure change passively moves the valve stem to change the valve from the open condition to the closed condition, wherein the coupling includes coupling the pressure line to the second valve port;

based on an ambient pressure change acting on the bellows, the bellows moving the valve stem to change the valve between the open condition and the closed condition.