Fluid handling – Line condition change responsive valves – Safety cut-off requiring reset
Patent
1984-10-04
1986-08-12
Rosenthal, Arnold
Fluid handling
Line condition change responsive valves
Safety cut-off requiring reset
137462, 137498, F16K 1730
Patent
active
046050396
ABSTRACT:
A runaway valve for an air-driven material pump that shuts off air flow to the pump when air flow rate exceeds a predetermined setting to prevent pump damage, wherein the valve includes a flow-responsive poppet valve member and an axially movable sleeve finely adjustable about a first position to select flow rate, and movable to a second position to interconnect the upstream and downstream sides of the poppet valve member to effect reset. A closed chamber with a vent hole buffers the upstream side of the poppet valve member from inlet pressure to delay valve closing and compensate for pressure transients. In its reset position, the sleeve isolates this chamber from inlet pressure to achieve faster reset.
REFERENCES:
patent: 1153850 (1915-09-01), Meier
patent: 2690758 (1954-10-01), Lee
patent: 3476141 (1969-11-01), Tillman
patent: 3910306 (1975-10-01), Ohrn
Johnson Myron J.
Kao Mark C. C.
Douvas A. G.
Rosenthal Arnold
Stewart-Warner Corporation
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