US PATENT SUBCLASS 188 / 313
.~.~ With valve controlling fluid flow between chambers or compartments of the 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}
313.~.~ With valve controlling fluid flow between chambers or compartments of the chamber {1}
314  DF  .~.~.~> With reservoir for fluid {1}

DEFINITION

Classification: 188/313

With valve controlling fluid flow between chambers or compartments of the chamber:

(under subclass 297) Thrust member and variable volume chamber wherein a regulator permits restricted movement of fluid from one section to another section as the volumes of the sections change.

(1) Note. In this subclass, a solid piston reciprocates within and fills the area bounded by a cylinder, and a passage permits restricted flow of liquid from one compartment of the cylinder to the other compartment. The passage is usually provided with a valve that is adjustable to vary the restriction.