US PATENT SUBCLASS 16 / 299
.~.~.~ Rotatable spring-engaging collar

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

221  DF  HINGE {32}
277  DF  .~ Resiliently biased hinge {10}
298  DF  .~.~ Having force adjustment {1}
299.~.~.~ Rotatable spring-engaging collar {2}
300  DF  .~.~.~.~> Having detention aperture or protuberance
301  DF  .~.~.~.~> Having tool-receiving aperture

DEFINITION

Classification: 16/299

Rotatable spring-engaging collar:

(under subclass 298) Hinge including a cylinder or annulus which is connected to the resiliently deformable member and is rotated about the hinge axis* to vary the force exerted on the hinged members*.