US PATENT SUBCLASS 269 / 27
.~ Cylinder-piston means in series with additional positioning means

Current as of: June, 1999
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269 /   HD   WORK HOLDERS

20  DF  WITH FLUID MEANS {7}
27.~ Cylinder-piston means in series with additional positioning means {4}
28  DF  .~.~> With separate air means in series with liquid means
29  DF  .~.~> Including self-contained manual pump means
30  DF  .~.~> With common fluid means for holding and releasing {1}
32  DF  .~.~> Mechanical means between fluid means and jaw {2}

DEFINITION

Classification: 269/27

(under subclass 20) Device including a cylinder-piston unit as set forth in (A) of the definition of subclass 25; and further means, either directly connected to or interrelated with said unit, to add to the efficacy of the unit, or to perform some function that said unit standing alone could not perform.

(1) Note. Patents including a fluid unit (usually the cylinder) that is moved as an entirety, by either fluid or nonfluid means, prior to operating said unit (cylinder) to actuate its associated jaw will be placed in this and indented subclasses.

(2) Note. See (2) Note under subclass 20.

(3) Note. Valving means, whether singular or plural, in parallel or in series, manual or nonmanual, are not deemed to be "additional positioning means" in series with fluid means unless the valve(s) is so connected or related that a portion of the valve structure itself moves a jaw or holder in addition to performing its function of directing the fluid and/or modifying the fluid pressure; such patents will be placed in subclasses 25+, if otherwise appropriate.

(4) Note. See the sketches accompanying the definitions of subclasses 25 and 32.

SEE OR SEARCH THIS CLASS, SUBCLASS:

25+, for patents including a cylinder-piston unit(s) that directly moves an associated jaw(s) without additional positioning means.