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

Claim 6:
7. A passive overpressure protective device, comprising:
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 that permits communication of pressure via the interior passage and a closed condition that blocks communication of pressure via the interior passage;
a valve stem that is mechanically coupled to the valve and that is configured for linear translation distal from and proximal to the valve body; and
a vacuum-filled bellows having a proximal end fixed with respect to the valve body and a distal end mechanically coupled to the valve stem, such that movement of the bellows responsive to an ambient pressure change passively linearly translates the valve stem to change the valve between the open condition and the closed condition.