US PATENT SUBCLASS 239 / 321
.~.~ Floating or biased piston

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

302  DF  INCLUDING SUPPLY HOLDER FOR MATERIAL {15}
320  DF  .~ Follower in holder {3}
321.~.~ Floating or biased piston {1}
322  DF  .~.~.~> Fluid pressure actuated

DEFINITION

Classification: 239/321

(under subclass 320) Apparatus in which the member acting against the material is resiliently urged to move or comprises means free to move toward the egress port.