Patent ID: 7802482
Filing Date: 2010-09-28
Classification: G01L

Abstract:
1. A diaphragm attaching structure of an electrostatic capacity type pressure gauge, in which a metal diaphragm for receiving a fluid pressure is provided in a tensional manner on one end of a metal tubular case, and a fixed side electrode for picking up a deflection displacement of the diaphragm as a change of an electric capacity is provided within the tubular case on a side opposite to a pressure receiving surface of the diaphragm, wherein an outer peripheral edge portion of the diaphragm is annular and formed thicker than a center portion thereof, and the thick outer peripheral edge portion and adjacent one end of the metal tubular case is thermally molten to form a weldment to firmly attached an end surface portion around the opening on the one end of the tubular case to the diaphragm.