US PATENT SUBCLASS 188 / 282.9
.~.~.~.~ Adjusting the tension via (a) compressing or expanding or (b) different strength springs

Current as of: June, 1999
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188 /   HD   BRAKES

266  DF  INTERNAL-RESISTANCE MOTION RETARDER {29}
281  DF  .~ Resistance alters relative to direction of thrust member (e.g., high resistance in one direction, low in the other) {1}
282.1  DF  .~.~ Via valved orifice in thrust member {4}
282.8  DF  .~.~.~ Spring-loaded valve {1}
282.9.~.~.~.~ Adjusting the tension via (a) compressing or expanding or (b) different strength springs

DEFINITION

Classification: 188/282.9

Adjusting the tension via (a) compressing or expanding or (b) different strength springs:

(under subclass 282.8) Spring-loaded, valved piston in which the coiled wire resiliency (a) can be varied or (b) comprises two different sizes.