US PATENT SUBCLASS 92 / 111
.~.~ Plural laterally spaced passages

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

109  DF  PISTON WITH RIGID AXIALLY EXTENDING HOLLOW STEM {2}
110  DF  .~ Hollow stem forms axially extending fluid passage {2}
111.~.~ Plural laterally spaced passages

DEFINITION

Classification: 92/111

(under subclass 110) Apparatus in which the tubular element includes two or more separate and distinct passages spaced from each other in a direction perpendicular to the direction of the piston axis.