(under the class definition) Apparatus comprising a wall portion of an expansible chamber, said wall portion being formed of flexible material or rigid members hinged or interfitted together so that the members are movable relative to each other; the flexing of the material or the relative movement of the members constituting the movement which effects the work function of the expansible chamber.
(1) Note. As to portion (1) of this definition the sheet of flexible material must be disclosed as of the type which flexes or is distorted to cause expansion of the expansible chamber. A member formed of flexible material such as a flexible material piston which is disclosed as being slidable in a chamber to cause expansion of the chamber is excluded. Such devices are classified below on other features.
SEE OR SEARCH THIS CLASS, SUBCLASS:
34+, for a bellows type expansible chamber wall.
48+, for plural flexible wall working members.
64, for plural relatively movable working members in which one of said working members is of the flexible wall type. SEE OR SEARCH CLASS
73, Measuring and Testing,
262+, for a collapsible chamber type fluid volume or rate of flow meter.
