US PATENT SUBCLASS 292 / 169.21
.~.~.~.~.~ Plural rollback elements directionally selectively effective

Current as of: June, 1999
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292 /   HD   CLOSURE FASTENERS

2  DF  BOLTS {15}
137  DF  .~ Sliding {9}
163  DF  .~.~ Spring projected {1}
164  DF  .~.~.~ Operating means {12}
169  DF  .~.~.~.~ Cam {5}
169.21.~.~.~.~.~ Plural rollback elements directionally selectively effective {2}
169.22  DF  .~.~.~.~.~.~> On separate spindles
169.23  DF  .~.~.~.~.~.~> On a tubular member

DEFINITION

Classification: 292/169.21

(under subclass 169) Device in which two or more rollback elements are provided, a portion of them functioning in one direction of spindle rotation and the remainder in the opposite direction.