US PATENT SUBCLASS 16 / 293
.~.~ Over-center spring or linkage travel (e.g., "holdback hinge")

Current as of: June, 1999
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16 /   HD   MISCELLANEOUS HARDWARE

221  DF  HINGE {32}
277  DF  .~ Resiliently biased hinge {10}
293.~.~ Over-center spring or linkage travel (e.g., "holdback hinge") {3}
294  DF  .~.~.~> Plural hinge axes
295  DF  .~.~.~> Coil spring having axis along or parallel to hinge axis
296  DF  .~.~.~> Including camming or sliding surface to deflect spring perpendicularly to the hinge axis

DEFINITION

Classification: 16/293

Over-center spring or linkage travel (e.g., "holdback hinge"):

(under subclass 277) Hinge including means which first causes the elastically deformable element to reach a point of maximum deflection as a hinged member* reaches a particular position in its swing about the hinge axis*, and then allows the element to retreat from the point of maximum deflection as the hinged member continues to swing past the position.

SEE OR SEARCH THIS CLASS, SUBCLASS:

291, for a hinge having a helical spring or elastic strip which is oriented transversely to the hinge axis* and which comprises an over-center mechanism.

323, for a hinge which included a toggle-actuated catch to fix the hinged members* in a particular relative position, but having no means to bias the hinged members about the hinge axis*.