US PATENT SUBCLASS 92 / 53
.~ With additional cylinder relatively slidable exteriorly of outer cylinder

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}
53.~ With additional cylinder relatively slidable exteriorly of outer cylinder

DEFINITION

Classification: 92/53

(under subclass 51) Apparatus including an additional cylinder receiving said second cylinder therein in coaxial relationship, said second cylinder sealingly engaging said additional cylinder and being axially slidable relative thereto.