US PATENT SUBCLASS 92 / 63
.~.~ With separate biasing means for a working member

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

61  DF  RELATIVELY MOVABLE WORKING MEMBERS {8}
62  DF  .~ First working member moves second coaxial working member through separating abutment surfaces {1}
63.~.~ With separate biasing means for a working member

DEFINITION

Classification: 92/63

(under subclass 62) Apparatus including a separate means other than the working fluid associated with at least one of the working members for continuously exerting a force in one direction of movement of said working member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

130+, and the search there noted, for a separate biasing means for a working member.