Pop-up sprinkler with shock absorbing riser spring
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United States of America Patent
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-
Oct 20, 1998
Grant Date -
N/A
app pub date -
Aug 16, 1996
filing date -
Aug 16, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A sprinkler unit comprises a tubular housing having an inlet for connecting to a source of water, a tubular riser telescopically reciprocally mounted in the tubular housing and moveable from a retracted position within the housing to an extended position from the housing, the riser having an outlet having a nozzle for distributing a stream of water outward from the housing, a passage connecting the inlet to the outlet, a retraction spring normally biasing the riser to the retracted position, and a shock absorbing coating on the retracting spring for absorbing the shock of movement of the riser to the extended position.
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