US PATENT SUBCLASS 188 / 282.1
.~.~ Via valved orifice in thrust member

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.~.~ Via valved orifice in thrust member {4}
282.2  DF  .~.~.~> Valve actuated by electrical system {2}
282.5  DF  .~.~.~> Flexible flap-type valve (e.g., compression washers) {1}
282.7  DF  .~.~.~> Ball-type valve
282.8  DF  .~.~.~> Spring-loaded valve {1}

DEFINITION

Classification: 188/282.1

Via valved orifice in thrust member:

(under subclass 281) Resistance altered depending on piston direction wherein the member is provided with an opening for the passage of gas or liquid through the opening, and the opening is provided with an element for regulating the opening.

(1) Note. Included in this subclass are pistons in which usually two orifices are provided in the piston or thrust member; one of which orifices has a one-way valve that permits flow of fluid in one direction and restricts flow of fluid in the opposite direction.

SEE OR SEARCH THIS CLASS, SUBCLASS:

317+, for a variable volume chamber in which fluid flows through an orifice in a piston.

322.15, for the particular structure of the piston member.