Runaway protective fuse valve
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United States of America Patent
Stats
-
Aug 12, 1986
Grant Date -
N/A
app pub date -
Oct 4, 1984
filing date -
Oct 4, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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