US PATENT SUBCLASS 254 / 237
.~ Including ratchet bar and driving pawl drive

Current as of: June, 1999
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254 /   HD   IMPLEMENTS OR APPARATUS FOR APPLYING PUSHING OR PULLING FORCE

199  DF  PORTABLE IMPLEMENTS OR APPARATUS FOR TENSIONING FLEXIBLE MATERIAL OR FOR EXTRACTING STUMPS OR POLES {12}
237.~ Including ratchet bar and driving pawl drive {1}
238  DF  .~.~> Having plural, disparate, driving pawls {1}

DEFINITION

Classification: 254/237

Including ratchet bar and driving pawl drive:

(under subclass 199) Implements or apparatus wherein the portion of the implement or apparatus adapted to contact the flexible member or article is moved by a driving structure including a bar having a row of teeth or apertures on at least one of its sides and a reciprocable pawl which engages one or more of the teeth or apertures of the bar when reciprocating in one of its directions and which disengages from the teeth or apertures during its return movement, the pawl shifting relative to the bar along its length as the pawl sequentially engages the teeth or apertures of the row while the member is being stressed or the article is being dislodged.

(1) Note. A reciprocating rack which engages and pulls on either a fixed pin, or a pin which is shifted only linearly when pulled by the rack, is not considered proper for this subclass and will be found in subclasses 243+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

108+, for a ratchet bar shifted by a driving pawl.