US PATENT SUBCLASS 188 / 319.2
.~.~.~.~ Orifice size varied using a hand or hand tool

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  DF  .~.~.~ Via fixed or variable orifice in piston {4}
319.2.~.~.~.~ Orifice size varied using a hand or hand tool

DEFINITION

Classification: 188/319.2

Orifice size varied using a hand or hand tool:

(under subclass 317) Reciprocating piston with fluid flow through an orifice in which the dimension of the opening is regulated by a person: (a) turning, for example, a knob connected to the flow restrictor or the chamber cylinder or (b) using a wrench or screwdriver; both (a) and (b) located outside the container.

(1) Note. An example of subject matter in this subclass would be two plates, rotatable with respect to each other, having a hole in each plate. Slightly rotating one plate with respect to the other would create an opening smaller than either hole.

SEE OR SEARCH THIS CLASS, SUBCLASS:

278, for a manually adjustable thermostatic valve in a shock absorber.

299.1, for a retarder controlled by an operator (e.g., vehicle driver) remote from the retarder.

309, and 310, for a manually adjustable valve in a shock absorber wherein a blade oscillates.