US PATENT SUBCLASS 188 / 317
.~.~.~ Via fixed or variable orifice in piston

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.~.~.~ Via fixed or variable orifice in piston {4}
318  DF  .~.~.~.~> And passage venting fluid external to chamber
319.1  DF  .~.~.~.~> Having an orifice adjustment for both jounce or bound (compression) and rebound
319.2  DF  .~.~.~.~> Orifice size varied using a hand or hand tool
320  DF  .~.~.~.~> Tortuous path orifice

DEFINITION

Classification: 188/317

(under subclass 316) Device wherein fluid moves via an

opening in said member that extends between said faces.

SEE OR SEARCH THIS CLASS, SUBCLASS:

282.7, for a shock absorber having a piston provided with a one-way valve in its orifice.

289, for a shock absorber having a piston provided with an orifice, through which orifice extends an elongated tapered metering rod.