Seal for a joint or juncture – Seal between fixed parts or static contact against... – Contact seal between parts of internal combustion engine
Reexamination Certificate
2007-04-17
2007-04-17
Pickard, Alison K. (Department: 3673)
Seal for a joint or juncture
Seal between fixed parts or static contact against...
Contact seal between parts of internal combustion engine
C277S595000
Reexamination Certificate
active
11038492
ABSTRACT:
A metal gasket capable of preventing the occurrence of cracks in a stopper while employing a wave-shaped stopper, improving the contact pressure balance around the bead to enhance the engine performance, and improving the durability of the stopper. The metal gasket is constituted by a gasket component sheet having an opening formed to face a combustion chamber, and the gasket component sheet is provided with a combustion chamber bead surrounding the opening. An inner circumference side stopper lower than the height of the combustion chamber bead is formed along the combustion chamber bead in a portion between the combustion chamber bead and the opening such that at least a section of each wave where stress amplitude is large becomes thin, a thin portion and a thick portion are arranged alternately in each wave, and the hardness of the thin portion is higher than that of the thick portion.
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Hatamura Koichi
Kumashiro Masahisa
Mahigashi Reiji
Ogino Hiroyuki
Okudaira Yasuyuki
Armstrong Kratz Quintos Hanson & Brooks, LLP
Hatamura Koichi
Kokusan Parts Industry Co., Ltd.
Pickard Alison K.
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