US PATENT SUBCLASS 92 / 52
.~ Cylinder or sleeve forms working member

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

51  DF  MUTUALLY RELATIVELY MOVABLE CYLINDER OR SLEEVE, MEMBER SEALINGLY SLIDABLE THEREIN AND OUTER CYLINDER THEREFOR {2}
52.~ Cylinder or sleeve forms working member

DEFINITION

Classification: 92/52

(under subclass 51) Apparatus in which said first cylinder or tubular element is so arranged in the device as to constitute a working member.