US PATENT SUBCLASS 254 / 206
.~.~ 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}
200  DF  .~ Material comprises resilient floor covering (e.g., carpet) {8}
206.~.~ Including ratchet bar and driving pawl drive {1}
207  DF  .~.~.~> Having plural, disparate, driving pawls

DEFINITION

Classification: 254/206

Including ratchet bar and driving pawl drive:

(under subclass 200) Implements or apparatus in which the portion of the implement or apparatus adapted to contact the resilient fabric or structure is moved by 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 fabric or resilient structure is being stressed.

(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 209+.

SEE OR SEARCH THIS CLASS, SUBCLASS:

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