Kokusan Parts Industry Co., Ltd.

Hironobu Imanaka

Takashi Suzuki

Yoshitaka Abe

Yoshinori Iwamoto

Yukio Yoshida

Kazuhiko Ikeda

Takeshi Naito

A metal gasket comprising a least one gasket sheet, wherein a hardness lowering region having a locally lowered hardness is formed in the gasket sheet in at least either a portion to be set to have a large elongation or a portion to be lowered in a spring constant. Also disclosed is a metal gasket manufacturing process comprising: the step of forming an opening of a desired size in registration with a cylinder bore in an elastic metal sheet as a material for making a gasket sheet composing a metal gasket; the step of annealing a portion, as corresponding to the first hardness lowering region in the gasket sheet, of the elastic metal sheet; and the step of forming a folded portion by folding back the vicinity of the opening.

Metal gasket and process for manufacturing the same

A sealing structure for sealing a valve body from a separating plate in a liquid-tight fashion. A first sealing layer is printed on the mating surface of the separate plate and a second sealing layer is printed along the first sealing layer with at least a part of the second sealing layer overlapping the first sealing layer and the printing height of the second sealing layer being made larger than that of the first sealing layer whereby the valve body and the separate plate are sealed liquid-tight from each other by a sealing portion comprising the first and second sealing layers. The sealing portion provided by the sealing structure of the present invention has the advantages that it hardly comes off, has an excellent sealing property and is capable of reducing the width thereof to meet a design change.

Sealing structure

A seal structure and capable of reducing a width of a seal portion as much as possible while preventing the seal portion from being broken away. The seal structure for sealing between two members in a fluid-tight or air-tight manner is structured such that the seal portion is formed in at least one of joint surfaces of the two members by continuously printing along a seal portion of the joint portions and that a recess portion or a groove is formed at a middle portion of the seal portion in a widthwise direction.

Growing community of inventors

Toyonaka, Japan

Hironobu Imanaka