US PATENT SUBCLASS 446 / 180
.~ Including variable-size fluid chamber to move fluid

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.~ Including variable-size fluid chamber to move fluid {5}
181  DF  .~.~> Supplying compressed gas to rupture sheet (e.g., film burster) {1}
183  DF  .~.~> Squeezable figure {1}
186  DF  .~.~> Contractable balloon for moving fluid {1}
188  DF  .~.~> Sounding {5}
197  DF  .~.~> Bellows or bulb for moving fluid {1}

DEFINITION

Classification: 446/180

Including variable-size fluid chamber to move fluid:

(under subclass 176) Device including an enclosure of changeable volume for imparting energy to the liquid or gas.

SEE OR SEARCH THIS CLASS, SUBCLASS:

15+, for a bubble-making device having a variable size fluid chamber for inflating bubbles.