US PATENT SUBCLASS 49 / 237
.~.~ Biased by inclined cam and descending slide or roller

Current as of: June, 1999
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49 /   HD   MOVABLE OR REMOVABLE CLOSURES

208  DF  MOUNTED FOR MULTIDIRECTIONAL OR OBLIQUE MOVEMENT {7}
236  DF  .~ One direction imparts gravitational bias to swinging closure; e.g., rising hinge {2}
237.~.~ Biased by inclined cam and descending slide or roller {2}
238  DF  .~.~.~> Shiftable cam
239  DF  .~.~.~> Mating inclined cam and slide surfaces

DEFINITION

Classification: 49/237

(under subclass 236) Device wherein the additional movement is effected by an inclined surface on either the closure or

its support and of a relatively sliding or rolling surface of either on the other.

SEE OR SEARCH CLASS

16, Miscellaneous Hardware,

312+, for a hinge having cooperating cam surfaces to raise and bias a closure to return position.