US PATENT SUBCLASS 239 / 205
.~.~.~.~ With spring assisted retraction

Current as of: June, 1999
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239 /   HD   FLUID SPRINKLING, SPRAYING, AND DIFFUSING

200  DF  WITH FIXED SUPPORT FOR OR GROUND INSTALLED SUPPLY MEANS (E.G., STATIC CONSTRUCTIONAL INSTALLATIONS) {4}
201  DF  .~ Embedded or buried sprinkler {2}
203  DF  .~.~ With sprinkler head elevating means {1}
204  DF  .~.~.~ Elevating means responsive to flow of spray fluid {2}
205.~.~.~.~ With spring assisted retraction

DEFINITION

Classification: 239/205

(under subclass 204) Apparatus having a resilient means which assists the return of the sprinkler to nonuse housing or embedded position.