Undulated container for undulated diaphragm and diaphragm device

Abstract

An undulated diaphragm, which has an approximately circular, flat plate-shaped central portion and a peripheral portion composed of a series of alternate, approximately concentric convex and concave portions, is clamped between two undulated container members each having an approximately bowl-shaped recess. The recesses of the container members are each composed of a series of alternate, approximately concentric concave and convex portions, which are complementally formed to correspond to the approximately concentric convex and concave portions of the diaphragm when extended. When the pressure in one recess is raised, the diaphragm successively moves toward the other recess and finally comes in contact with the second recess completely and snugly fits thereto. When the pressure in the first recess is lowered, the diaphragm successively moves toward the first recess and finally comes in contact with the first recess completely and snugly fits thereto. Deformation of the diaphragm during movement is restricted by virtue of the elasticity and rigidity of the diaphragm and the structure thereof, which includes a series of alternate, approximately concentric convex and concave portions. Thus, the diaphragm regularly extends and contracts without causing local inversion of the direction of bending during the movement.

Dependencies are inferred from the claim text.