US 11,946,550 B2
Overpressure protective device and method for passively blocking gas flow at a pressure setpoint
Taylor M. Campbell, Austin, TX (US)
Assigned to Weed Instrument Company, Inc., Round Rock, TX (US)
Filed by Weed Instrument Company, Inc., Round Rock, TX (US)
Filed on Nov. 21, 2022, as Appl. No. 17/991,519.
Claims priority of provisional application 63/357,924, filed on Jul. 1, 2022.
Prior Publication US 2024/0003448 A1, Jan. 4, 2024
Int. Cl. F16K 17/04 (2006.01)
CPC F16K 17/0493 (2013.01) [F16K 17/044 (2013.01); Y10T 137/1842 (2015.04)] 22 Claims
OG exemplary drawing
 
1. 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 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 between the open condition and the closed condition.