US PATENT SUBCLASS 92 / 131
.~ Biasing means maintains working member intermediate stroke end limits

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

130 R  DF  WITH SEPARATE BIASING MEANS FOR WORKING MEMBER {9}
131.~ Biasing means maintains working member intermediate stroke end limits

DEFINITION

Classification: 92/131

(under subclass 130) Apparatus in which the working member is normally maintained in a position intermediate the ends of the working chamber by said force exerting means, so that upon removal of the force exerted to move the working member in the operation of the expansible chamber device, the working member is returned to such position by said force exerting means.