GASKET

• US 20190323606A1
• Filed: 04/18/2018
• Published: 10/24/2019
• Est. Priority Date: 04/18/2018
• Status: Active Grant

• Current Assignee: Ishikawa Gasket Co., Ltd.
• Original Assignee: Ishikawa Gasket Co., Ltd.
• Inventors: YASUDA, Kisho
• Granted Patent: US 10,738,889 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 15/011 all layers being formed of iron alloys or steels
• CPC Class Codes: F01N 13/10 of exhaust manifolds with cooling jacket F01N3/046
• CPC Class Codes: F01N 13/1805 Fixing exhaust manifolds, exhaust pipes or pipe sections to each other, to engine or to vehicle body pipe joints in general F16L; fixing auxiliaries in motor vehicles in general B60K
• CPC Class Codes: F01N 13/1827 Sealings specially adapted for exhaust systems sealings in general F16J15/00
• CPC Class Codes: F16J 15/0825 laminated
• CPC Class Codes: F16J 2015/085 without fold over
• CPC Class Codes: F16J 2015/0868 Aspects not related to the edges of the gasket

Abstract

A gasket formed by laminating two or more metal plates includes a seal target hole, an annular seal portion sealing an outer peripheral edge of the seal target hole, and a plurality of bolt holes disposed at the outer peripheral side of the seal portion. Each metal plate constituting a thermal deformation coping portion is provided with slits intersecting in a longitudinal direction of the metal plate and each slit constitutes a lamination portion of the metal plate so as not to penetrate in a lamination direction. When one seal target hole is provided, a portion suspended in the seal target hole is formed at the thermal deformation coping portion, and when multiple seal target holes are provided, at least one of portions interposed between the adjacent seal portions and a portion interposed between the adjacent bolt holes is formed at the thermal deformation coping portion.

Claims

1. A gasket formed of two or more metal plates laminated together and comprising at least one seal target hole penetrating in a lamination direction, an annular seal portion sealing an outer peripheral edge of the seal target hole, and a plurality of bolt holes disposed at an outer peripheral side of the seal portion so that fastening bolts are inserted therethrough,

wherein all metal plates constituting the thermal deformation coping portion includes slits, as a thermal deformation coping portion, intersecting in a longitudinal direction of the metal plate and the slits constitute a lamination portion of the metal plates without penetrating in the lamination direction, and

a portion suspended in the seal target hole is formed at the thermal deformation coping portion when one seal target hole is provided, and at least one of a portion interposed between the adjacent seal portions and a portion interposed between the adjacent bolt holes is formed at the thermal deformation coping portion when the seal target hole is plural.

2. The gasket according to claim 1, wherein the slit is formed at a center portion of the thermal deformation coping portion in the longitudinal direction.

3. The gasket according to claim 1, wherein the slit crosses the thermal deformation coping portion.

4. The gasket according to claim 1, wherein two sides of the slits of the metal plates constituting the thermal deformation coping portion are set not to contact each other at a time of using the gasket.

5. The gasket according to claim 1, wherein the gasket is interposed between pipe bodies having different number of ventilation holes,

the gasket includes a partition protector formed in one of the plurality of seal target holes;

one of the plurality of seal portions;

the plurality of bolt holes; and

a partition protector which is suspended in the seal target hole to cover a partition portion formed in the pipe body having a relatively large number of the ventilation holes, and

the partition protector is formed at the thermal deformation coping portion.

6. The gasket according to claim 1, wherein

the gasket is a head gasket used while being interposed between a cylinder block and a cylinder head of an internal combustion engine,

the gasket comprises a plurality of bore holes which correspond to the seal target holes;

the seal portion which seals outer peripheral edges of the bore holes; and

the plurality of bolt holes disposed at an outer peripheral side of the seal portion, and

a portion interposed between the adjacent bolt holes is formed at the thermal deformation coping portion.

7. The gasket according to claim 1, wherein the gasket is a manifold gasket interposed between an exhaust manifold and a cylinder head of an internal combustion engine, and

the gasket comprises a plurality of main body portions, each including one of the plurality of seal target holes, one of the plurality of seal portions, and the plurality of bolt holes;

and a connection portion which connects the main body portions adjacent thereto, and

the connection portion is formed by the thermal deformation coping portion.