US PATENT SUBCLASS 297 / 423.33
.~.~.~.~.~.~ Adjustable friction detent

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

423.1  DF  REST FOR KNEE, LEG, OR FOOT {6}
423.19  DF  .~ Connected to chair or seat for relative movement {5}
423.26  DF  .~.~ Pivoted for vertical swinging (i.e., about horizontal axis) {4}
423.3  DF  .~.~.~ Pivot axis adjacent and parallel to front edge of bottom {2}
423.31  DF  .~.~.~.~ Held by a prop behind rest {1}
423.32  DF  .~.~.~.~.~ Prop adjusts rest to plural use positions {1}
423.33.~.~.~.~.~.~ Adjustable friction detent

DEFINITION

Classification: 297/423.33

Adjustable friction detent:

(under subclass 423.32) Device wherein the adjustment means includes two contacting relatively movable parts, and wherein

a resistance to relative motion of the moving parts is generated by the contact of one part with the other, and wherein that contact may be increased or decreased to prevent or permit such relative motion.