US PATENT SUBCLASS 16 / 304
.~.~ Coil

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

221  DF  HINGE {32}
277  DF  .~ Resiliently biased hinge {10}
304.~.~ Coil {3}
305  DF  .~.~.~> Plural coils
306  DF  .~.~.~> To counterbalance weight of hinged member (e.g., horizontal closure biased to open position)
307  DF  .~.~.~> On pintle

DEFINITION

Classification: 16/304

Coil:

(under subclass 277) Hinge wherein the resiliently deformable element comprises a helix or a flat spiral.

SEE OR SEARCH THIS CLASS, SUBCLASS:

280+, for a double-acting spring hinge which employs a torsion coil spring.

286+, for a hinge having a helical spring arranged transversely to the hinge axis.