US PATENT SUBCLASS 16 / 283
.~.~.~.~ And barrels for helical springs on separate axes

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}
282  DF  .~.~.~ Plural hinge axes (e.g., multiple pintle) {1}
283.~.~.~.~ And barrels for helical springs on separate axes

DEFINITION

Classification: 16/283

And barrels for helical springs on separate axes:

(under subclass 282) Hinge comprising two elastically deformable elements in the form of helixes, each being arranged about a separate hinge axis* and surrounded by a coaxial cylindrical cover.