Nippon Gasket Company, Ltd.

Yuji Fukui

Kunitoshi Inoue

Kenji Kubouchi

Hiroshi Uemura

Yutaka Furuta

Naoki Ii

Kenichi Sekioka

Yasuhiro Miyamoto

A metal gasket is disclosed in which a shim laid on a bead plate around bore apertures in the bead plate is varied in radial width along the peripheries of the bore apertures to compensate for sealing stress circumferentially of the bore apertures. The metal gasket is composed of a bead plate with beads around its bore apertures and a shim including annular areas defining bore apertures and bridges connecting together any two adjoining annular areas. The shim around the bore apertures has a radial width at the bridges, which is substantially equal with a width across a web defined between any adjoining cylinder bores formed in mating surfaces of the cylinder block and cylinder head. Moreover, the shim at areas other than the bridges is varied continuously in its radial width in a range of from a flat area around the bore apertures to an area corresponding to the bead on the bead plate. Variations in radial width of the shim makes compensate partly for a sealing stress distribution around the first bore apertures.

Metal gaskets

A metal gasket is disclosed in which a sealing stress exerted on a deck-surface from any one of confronting bead plates is dispersed slantwise along the direction leaving its associated cylinder bore aperture so that the cylinder bores are protected from deformation owing to the high sealing stress occurring in the open-end portions of the cylinder bores. The bead plates have sealing beads confronting flanges of an first intermediate plates at their borderlines smaller radially of their associated cylinder bore apertures while confronting the first intermediate plate, less in thickness than the flanges, at their borderlines larger radially of their associated apertures. The sealing stress on the deck-surfaces of the cylinder block and cylinder liner due to deformation of the beads may be dispersed uniformly over the flanges to thereby reduce the influence of the sealing stress on the liner section of the cylinder liner.

Multi-layer metal gasket

A metal gasket for a cylinder head includes a superposed assembly of an elastic metal base plate having a plurality of beads formed along a plurality of juxtaposed holes for combustion chambers, an elastic metal adjusting plate having a plurality of beads formed along a plurality of juxtaposed holes for combustion chambers, and a grommet having a plurality of juxtaposed holes for combustion chambers which are smaller in diameter than the holes in the base and adjusting plates. The grommet is folded about the edges of the holes in the adjusting plate lying between the base plate and the grommet in intimate contact therewith, so that the holes in the base and adjusting plates and the grommet may be aligned to form a plurality of bores. The bead on the base plate is formed as a full bead between every two adjoining holes and as a half bead around the remaining edge of each hole, while the bead on the adjusting plate is a full bead along the entire edge of each hole, so that the bead on the base plate may extend over the bead on the adjusting plate between every two adjoining bores.

Laminated metal gasket having a varying bead structure, thickness, and

This metal gasket for chain case-carrying engines is capable of reliably preventing the entry of an oil into height different parts, which occur on abutting surfaces of a cylinder block and a chain case, even when the oil deposited on the chain case scatters during a movement of a chain, and improving the reliability thereof owing to its durability. This metal gasket has first and second elastic metal plates provided with beads extending along an opening, in which the chain moves, and an intermediate plate provided with bores packed with seal members for sealing the height different parts occurring at the abutting surfaces of the chain case and cylinder block. The second elastic metal plate is provided with recesses formed by cutting out the portions thereof in which the seal members are positioned.

Growing community of inventors

Osaka-fu, Japan

Yuji Fukui