US PATENT SUBCLASS 188 / 301
.~.~ Causing air suction in chamber

Current as of: June, 1999
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188 /   HD   BRAKES

266  DF  INTERNAL-RESISTANCE MOTION RETARDER {29}
297  DF  .~ Having a thrust member with a variable volume chamber (e.g., coaxial or telescoping tubes, compensating reservoir) {7}
301.~.~ Causing air suction in chamber

DEFINITION

Classification: 188/301

(under subclass 297) Device wherein said fluid is gaseous atmosphere, and movement of said member within said container generates a subnormal atmospheric pressure in said container.