The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 12, 2011
Filed:
Aug. 06, 2007
Takeshi Miyoshi, Sanda, JP;
Hiroki Hayashi, Sanda, JP;
Masao Konaka, Sanda, JP;
Yoshinari Kobuchi, Sanda, JP;
Hiroyuki Sasakura, Osaka, JP;
Takeshi Miyoshi, Sanda, JP;
Hiroki Hayashi, Sanda, JP;
Masao Konaka, Sanda, JP;
Yoshinari Kobuchi, Sanda, JP;
Hiroyuki Sasakura, Osaka, JP;
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Abstract
By improving a metal gasket having a corrugated portion which is advantageous in sealing property, a non-asbestos gasket in which the sealing property is further improved is provided. A non-asbestos gasket has a three-layer structured sealing portion S configured by: a core layerA which is made of a plate of a metal, and which is formed into a concentric circle-like corrugated shape; and surface layerswhich are made of expanded graphite, and which are stacked on the front and back faces of the core layer, respectively. In an outer circumferential end of the sealing portion S, the core layerA is protruded from the front and back surface layerstoward an outer diameter side. In an inner circumferential end of the sealing portion S, the front and back surface layersare protruded from the core layerA toward an inner diameter side, thereby covering the core layerA.