US PATENT SUBCLASS 92 / 19
.~.~ Self-engaging

Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

15  DF  WITH RELEASABLE STOP OR LATCH MEANS TO PREVENT MOVEMENT OF WORKING MEMBER {8}
18  DF  .~ Includes interfitting parts engageable at plural positions including position intermediate stroke limits {1}
19.~.~ Self-engaging

DEFINITION

Classification: 92/19

(under subclass 18) Apparatus in which means are provided to bias the intermeshing element toward engaging position with the working member or member moved thereby, so that the intermeshing element is self engaging as the working member or member moved thereby reaches one of said predetermined locations.