Patent ID: 8567790
Filing Date: 2013-10-29
Classification: F16J

Abstract:
1. A metal gasket for sealing an interface between a cylinder head and a cylinder body of an engine body, the metal gasket comprising: first and second bead plates, each of the first and second bead plates including: a plurality of primary beads arranged to protrude outward; a secondary bead arranged to protrude outward, the secondary bead including an inner side adjacent to the plurality of primary beads and an outer side spaced from the inner side; a plurality of cylinder openings; a plurality of cooling water holes; an exhaust gas hole; and a plurality of exhaust cooling water holes arranged around the exhaust gas hole, wherein the plurality of cylinder openings are arranged in a row and the exhaust gas hole is offset from the row of the plurality of cylinder openings; and an inner member disposed between at least a portion of the first and second bead plates, the plurality of primary beads are defined by the first and second bead plates and the inner member disposed between the first and second bead plates, and the secondary bead is defined by the first and second bead plates and partially by the inner member such that the inner member is located at an inner side of the secondary bead that is adjacent to the plurality of primary beads but only the first and second bead plates and not the inner member are located at an outer side of the secondary bead; wherein the plurality of primary beads are full beads arranged adjacent to a periphery of the plurality of cylinder openings, respectively; the secondary bead is positioned on an opposite side of the plurality of primary beads from the plurality of cylinder openings; the secondary bead surrounds all of the plurality of primary beads; the secondary bead has a plateau shape including a plateau portion and bent portions extending to the plateau portion, the plateau portion of the secondary bead defines an outermost layer of the metal gasket, and the plurality of cooling water holes are located in the plateau portion of the secondary bead between the inner side and the outer side of the secondary bead; and the metal gasket includes three half beads arranged between the exhaust gas hole and an outer periphery of the metal gasket, a first of the three half beads is disposed such that an open end of the first half bead is positioned at the outer periphery of the metal gasket, and a second and a third of the three half beads are positioned such that open ends of the second and third half beads are positioned at an inner periphery of at least one of the plurality of exhaust cooling water holes.