US PATENT SUBCLASS 441 / 93
.~.~.~.~ With puncturing means

Current as of: June, 1999
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441 /   HD   BUOYS, RAFTS, AND AQUATIC DEVICES

80  DF  WATER RESCUE OR LIFE PROTECTING APPARATUS {8}
88  DF  .~ Personal flotation device {9}
90  DF  .~.~ With mechanical inflation means {3}
92  DF  .~.~.~ By compressed gas means {2}
93.~.~.~.~ With puncturing means {2}
94  DF  .~.~.~.~.~> Lever actuated
95  DF  .~.~.~.~.~> Actuated by water softened or soluble member

DEFINITION

Classification: 441/93

With puncturing means:

(under subclass 92) Device including means for piercing a seal on the pressurized gas source in order to allow the gas to flow into the chamber.