Expansible chamber devices

SECTION I - CLASS DEFINITION

(A) This class relates to devices which include an expansible chamber, said chamber having a wall portion thereof (i.e., a working member) movable in a to and fro motion to vary the volume of the chamber, and having a fluid conducting passage means in communication with the chamber for introducing or withdrawing fluid therefrom, said device being the type in which:

(1) The introduction of fluid into the chamber or the withdrawal of fluid from the chamber acts upon the movable wall portion and effects a movement thereof in a direction to change the volume of the chamber and produce a mechanical force output which is employed to do work (e.g., motor) or

(2) Application of a mechanical force to the movable wall portion effects a movement of such movable wall portion in a direction to change the volume of the chamber to draw fluid into or expel fluid from the chamber (e.g., pump).

(B) This class also takes miscellaneous subcombinations of motors or pumps disclosed as being of the type having a chamber as indicated in part A, above, not involving control of the working fluid and not provided for in other classes, (e.g., bellows walls, diaphragms or pistons).