US PATENT SUBCLASS 292 / 169.19
.~.~.~.~.~ Bolt has ancillary projection spring

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}
169.19.~.~.~.~.~ Bolt has ancillary projection spring

DEFINITION

Classification: 292/169.19

(under subclass 169) Device having another projection spring, usually of a lighter scale than the principal projection spring, that is compressed independently of the latter spring when the bolt head is subjected to an external, depressive force, but which ordinarily is compressed along with the principal spring when retraction is accomplished by the mechanism provided.