US PATENT SUBCLASS 92 / 130 R
WITH SEPARATE BIASING MEANS FOR WORKING MEMBER

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

130 RWITH SEPARATE BIASING MEANS FOR WORKING MEMBER {9}
131  DF  .~> Biasing means maintains working member intermediate stroke end limits
132  DF  .~> Tension spring
133  DF  .~> Adjustable
134  DF  .~> Fluid spring
135  DF  .~> Biasing means engages working fluid contacting portion of working member
130 A  DF  .~> Bias normally held inoperative by fluid pressure
130 B  DF  .~> Bias other than coil spring
130 C  DF  .~> Bias external of both expanding and contracting chamber
130 D  DF  .~> Plural coil springs

Unofficial Alpha Subclasses: R A B C D

DEFINITION

Classification: 92/130

(under the class definition) Apparatus including a separate means other than the working fluid associated with the working member for continuously exerting a force in one direction of movement of the working member.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7, for an overcenter means for biasing a working member in one directionduring a portion of the stroke, and in the opposite direction during a second portion of the stroke.

40, for a biasing means for a bellows type expansible chamber wall portion.

84, for a resilient element interposed between a working member and a relatively movable power element.

85, for a device which acts on a working member over a portion only of the stroke thereof to form a cushioning means for the working member. 94+, for a biasing means for a flexible wall type working member.

SEE OR SEARCH CLASS

251, Valves and Valve Actuation,

63.6, for an expansible chamber valve actuator which includes spring means biasing the working member of the expansible chamber device.