Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Patent
1997-04-18
1999-10-05
Ferensic, Denise L.
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
137462, 137517, 248362, 251 636, 251 28, F16K 1700
Patent
active
059608218
ABSTRACT:
A flow sensor device includes a main passage having a normally open shut off valve therein which is configured to shut off at a predetermined rate of air flow therethrough. The shut off valve includes a seating structure and a centering structure positioned within the main passage, a sealing member being positioned between the seating structure and centering structure. The sealing member is biased toward the centering structure by a resilient member. Air flow through the main passage exerts a force on the sealing member which pushes the sealing member toward the seating structure. When the force caused by the air flow exceeds the opposing force of the resilient member, the sealing member contacts the seating structure in a sealing relationship such that air flow through the main passage is substantially eliminated. The flow sensor device may also include a controllable release valve and/or a controllable reset valve, enabling control of the shut off valve of the main passage. Further, an air pulse distribution device is also provided for controlling the reset valves and/or release valves of a plurality of flow sensor devices.
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Farid Ramyar
Ferensic Denise L.
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