Patent Number: 6,916,024

Title: Gasket

Abstract: In order to provide a gasket which can be repeatedly used over a temperature range in which a rubber gasket cannot be used, which does not have any risk of damaging a flange, and which can follow the change of the distance between flanges, a gasket is constructed in such a way that two metallic coned disc springs each of which has a circulation opening for a fluid in a central portion and each of which is formed into a seal surface in which an outer peripheral portion with respect to the circulation opening rises having an arc-like curved surface are combined while being oppositely directed and have outer diameter peripheral edge portions which are welded and fixed so that by tightening flanges, repulsive force of the two coned disc springs concentratedly affects the seal surfaces consisting of the arc-like curved surfaces, and a tight fluid seal is formed between the flange surfaces.

Inventors: Hanashima; Kanji (Hamamatsu, JP), Takahiro; Kenichi (Hamamatsu, JP), Shibata; Hideshi (Hamamatsu, JP), Mori; Hideaki (Hamamatsu, JP)

Assignee: Nichias Corporation

International Classification: F16L 23/20 (20060101); F16L 23/00 (20060101); F16J 15/08 (20060101); F16L 017/00 (); F16L 005/02 (); F16L 017/06 (); F16J 015/02 ()

Expiration Date: 07/12/2022