US PATENT SUBCLASS 92 / 184
.~.~.~ Passage in opposed piston faces

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

172  DF  PISTON {19}
181 R  DF  .~ With fluid passage in piston face {2}
182  DF  .~.~ Passage communicates with packing receiving recess {2}
184.~.~.~ Passage in opposed piston faces {1}
185  DF  .~.~.~.~> Passages communicate with common packing receiving recess

DEFINITION

Classification: 92/184

(under subclass 182) Apparatus in which the piston is provided with opposed end faces each of which is provided with a fluid port or passage.