US 6,981,703 B2 | ||
Cylinder head gasket | ||
Yuichi Kinoshita, Utsunomiya (Japan) | ||
Assigned to Ishikawa Gasket Co., Ltd., Tokyo (Japan) | ||
Filed on Dec. 17, 2003, as Appl. No. 10/736,700. | ||
Prior Publication US 2005/0134007 A1, Jun. 23, 2005 | ||
This patent is subject to a terminal disclaimer. | ||
Int. Cl. F02F 11/00 (2006.01) |
U.S. Cl. 277—592 | 1 Claim |
1. A cylinder head gasket, comprising:
one metal plate for forming the gasket having a cylinder bore, a folded portion formed around the cylinder bore and having
a largest thickness in the gasket, a liquid hole and a half bead formed around the liquid hole, and
a paint coating formed on at least one side of the metal plate outside the folded portion without overlapping thereto for
forming a surface pressure thereat, said paint coating having a hardness of 2H–6H in pencil hardness and being formed around
the folded portion to form a first paint coating therearound and also formed on and around the half bead surrounding the liquid
hole outside the first paint coating to form a second paint coating therearound, said second paint coating having a thickness
less than that of the first paint coating,
wherein said half bead forms an inner portion and an outer portion relative to the liquid hole so that when the gasket is
tightened, surface pressures on the gasket are arranged such that the folded portion is greater than the inner portion; the
inner portion is greater than the first paint coating; and the first paint coating is greater than the outer portion.
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