Quick release mechanism for sprinkler head
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United States of America Patent
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-
Mar 22, 1988
Grant Date -
N/A
app pub date -
Apr 21, 1986
filing date -
Apr 21, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Quick release mechanism for a sprinkler head includes a latch assembly for holding the valve in sealing engagement over an outlet orifice. The assembly comprises a generally U-shaped ejection plate pivotally mounted between the sprinkler head frame and valve in canted relation to the center line of the sprinkler head, and a thermal responsive element mounted between the sprinkler frame and valve-holding end of the ejection plate. The thermal responsive element contains a pellet of fusible alloy and a ceramic bearing slug and glass ball to hold the element between the ejection plate and sprinkler head frame in order to optimize the response time. The whole pellet housing with its heat fins is effectively insulated from the rest of the latch assembly by the glass ball and an insulator sleeve at its extremities. When the alloy melts, the ceramic slug and glass ball drop downwardly, destabilizing the latch assembly and thereby permitting fluid pressure to blow the seal at the outlet orifice. The orifice seal cap, ejection plate and thermal responsive element drop away so that pressurized fluid can pass freely through the orifice.
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