US PATENT SUBCLASS 49 / 236
.~ One direction imparts gravitational bias to swinging closure; e.g., rising hinge

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.~ One direction imparts gravitational bias to swinging closure; e.g., rising hinge {2}
237  DF  .~.~> Biased by inclined cam and descending slide or roller {2}
240  DF  .~.~> Shiftable pivot {3}

DEFINITION

Classification: 49/236

(under subclass 208) Device wherein the closure is mounted to turn from an initial position about a pivot, and wherein the closure is additionally moved in a direction against the force of gravity, so that when released, the closure moves about the pivot under the influence of gravity.

SEE OR SEARCH THIS CLASS, SUBCLASS:

228+, for a closure biased for gravitational movement along an inclined track.

SEE OR SEARCH CLASS

16, Miscellaneous Hardware,

309, for a gravity actuated hinge, per se.