(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.
