US PATENT SUBCLASS 188 / 318
.~.~.~.~ And passage venting fluid external to 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}
316  DF  .~.~ Fluid through or around piston within chamber {1}
317  DF  .~.~.~ Via fixed or variable orifice in piston {4}
318.~.~.~.~ And passage venting fluid external to chamber

DEFINITION

Classification: 188/318

(under subclass 317) Device wherein said container is further provided with a hydraulic connection between said sections, said connection being outside of the container in which the member moves.

(1) Note. The external passage is in addition to an orifice in the piston, and is usually provided with a valve that is adjustable to vary the restriction to fluid flow.