US PATENT SUBCLASS 92 / 220
.~.~.~ Threaded fastener

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

172  DF  PISTON {19}
208  DF  .~ Open-ended hollow skirt type (e.g., trunk type) {15}
216  DF  .~.~ Plural separable parts {3}
220.~.~.~ Threaded fastener {1}
221  DF  .~.~.~.~> Fastener extends through end face

DEFINITION

Classification: 92/220

(under subclass 216) Apparatus in which the parts are secured together by means of a separate threaded fastener member.