US PATENT SUBCLASS 446 / 195
.~.~.~ Reciprocating valve

Current as of: June, 1999
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446 /   HD   AMUSEMENT DEVICES: TOYS

176  DF  OPERATED BY RELATIVELY MOVING FLUID OR PRESSURE DIFFERENTIAL {9}
180  DF  .~ Including variable-size fluid chamber to move fluid {5}
188  DF  .~.~ Sounding {5}
195.~.~.~ Reciprocating valve {1}
196  DF  .~.~.~.~> Including piston slidable along central apertured member

DEFINITION

Classification: 446/195

Reciprocating valve:

(under subclass 188) Device wherein the sound-emitting means is fluid actuated and flow regulator is provided which comprises a member mounted for to-and-fro rectilinear movement.