US PATENT SUBCLASS 446 / 186
.~.~ Contractable balloon for moving 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  DF  .~ Including variable-size fluid chamber to move fluid {5}
186.~.~ Contractable balloon for moving fluid {1}
187  DF  .~.~.~> Jet-propelled balloon

DEFINITION

Classification: 446/186

Contractible balloon for moving fluid:

(under subclass 180) Device wherein the enclosure is formed of an elastomeric material which contracts due to the resilient property of the enclosure walls to impart energy to the fluid.