US PATENT SUBCLASS 92 / 112
.~.~ Passage communicates with lateral port extending through piston side wall portion

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}
112.~.~ Passage communicates with lateral port extending through piston side wall portion

DEFINITION

Classification: 92/112

(under subclass 110) Apparatus in which the piston is provided with a port opening through a side wall portion thereof, and said port is in open communication with the passage in the tubular element.