.~ Oppositely movable walls of common chamber (50) (69)
DEFINITION
Classification: 92/75
(under subclass 61) Apparatus in which the working members form opposite walls of a chamber which is adapted to receive the working fluid, said working members being movable toward and away from each other during the contraction and expansion of the expansible chamber.
SEE OR SEARCH THIS CLASS, SUBCLASS:
50, for a plurality of oppositely movable flexible wall working members positioned in a common chamber. Note the class definition, Statement Relating To Placement Of Patents Involving Combination And Subcombination Subclasses, and the paragraph following the title in the schedule of this class.
69, for oppositely moving working members in a common chamber, said working members being connected to a common rotatably mounted shaft. Note the class definition, Statement Relating To Placement Of Patents Involving Combination And Subcombination Subclasses, and the paragraph following the title in the schedule of this class.
SEE OR SEARCH CLASS
417, Pumps,
488, for an expansible chamber pump having plural pumping members forming opposite walls of a common pump chamber.
