US PATENT SUBCLASS 16 / 308
.~.~ Torsion spring

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


16 /   HD   MISCELLANEOUS HARDWARE

221  DF  HINGE {32}
277  DF  .~ Resiliently biased hinge {10}
308.~.~ Torsion spring

DEFINITION

Classification: 16/308

Torsion spring:

(under subclass 277) Hinge wherein the resiliently deformable element comprises a length of material the end portions of which are relatively twisted in opposite directions about its axis or its length, wherein the force tending to restore the length of material to its original state is employed to pivot a hinge member* about the hinge axis*.