US PATENT SUBCLASS 16 / 281
.~.~.~ Helical spring transverse to hinge axis

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

221  DF  HINGE {32}
277  DF  .~ Resiliently biased hinge {10}
280  DF  .~.~ Biased from either direction toward neutral position (e.g., double acting) {4}
281.~.~.~ Helical spring transverse to hinge axis

DEFINITION

Classification: 16/281

Helical spring transverse to hinge axis:

(under subclass 280) Hinge wherein the hinged member* is swung about the hinge axis* by an elastically deformable element comprising a coil spring in the form of a helix and arranged on the hinge such that the axis of the helix is orthogonal with the hinge axis.