US PATENT SUBCLASS 188 / 266.4
.~.~.~.~ Having plural openings

Current as of: June, 1999
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188 /   HD   BRAKES

266  DF  INTERNAL-RESISTANCE MOTION RETARDER {29}
266.1  DF  .~ Motion damped from condition (e.g., bump, speed change) detected outside of retarder {1}
266.2  DF  .~.~ Condition actuates valve or regulator {2}
266.3  DF  .~.~.~ Of the rotary type {1}
266.4.~.~.~.~ Having plural openings

DEFINITION

Classification: 188/266.4

Having plural openings:

(under subclass 266.3) Rotary valve in which an element of the flow controlling device has more than one aperture.