US PATENT SUBCLASS 297 / 366
.~.~.~ Rack and pawl

Current as of: June, 1999
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297 /   HD   CHAIRS AND SEATS

353  DF  MOVABLE BACK {2}
354.1  DF  .~ Tiltable {3}
354.12  DF  .~.~ Plural distinct occupant-supporting positions {11}
366.~.~.~ Rack and pawl {3}
367  DF  .~.~.~.~> Actuator disengages pawl {1}
370  DF  .~.~.~.~> Actuator disengages rack {1}
372  DF  .~.~.~.~> Depending pawl or rack prop pivoted to back

DEFINITION

Classification: 297/366

(under subclass 354.12) Device wherein the holding means comprises an elongated element having teeth or notches extending from one side thereof, and a cooperating element having a tooth engaging projection thereon to engage between two adjacent teeth, and wherein one of the two elements is pivoted at one of its ends so that the elements are relatively movable to and from each other in the direction of tooth extension.

SEE OR SEARCH THIS CLASS, SUBCLASS:

356, for a device having similar holding means provided with a mechanism to compel full movement of the back in one direction before permitting retrograde movement in the reverse direction.

363+, for back holding means comprising an axially moving pawl.

SEE OR SEARCH CLASS

74, Machine Element or Mechanism,

144+, for a rack and pawl device of general utility.