Gasket and sealing structure

Patent metadata

Field	Value
Publication number	US-2016273654-A1
Application number	US-201415034413-A
Country	US
Kind code	A1
Filing date	Oct 28, 2014
Priority date	Nov 7, 2013
Publication date	Sep 22, 2016
Grant date	—

Abstract

Provided is a gasket and a sealing structure capable of achieving an improvement in sealing performance against the gas having solubility to the rubber material without adversely affecting the assembly workability. A gasket ( 100 ) includes a gasket main body portion ( 110 ) that is compressed toward an opposing surface ( 620 ) by an end surface ( 510 ) in a device ( 500 ); a first annular convex portion ( 120 ) that protrudes from the gasket main body portion ( 110 ) toward the device ( 500 ), is compressed toward the opposing surface ( 620 ) by a chamfered portion ( 530 ), and is constituted by a curved surface tapered toward a tip thereof; and a second annular convex portion ( 130 ) that protrudes from the gasket main body portion ( 110 ) to an inner peripheral surface side, and is compressed toward radially outwardly by a body portion ( 610 ).

First claim

1 . A gasket, that is annular and made of rubber, for preventing gas leakage by sealing a gap between a first member and a second member, the first member having an end surface and an insertion hole opened in the end surface and being formed with a chamfered portion between the end surface and an inner peripheral surface of the insertion hole, the second member having an opposing surface opposing the end surface and a body portion inserted into the insertion hole, the gasket comprising:
a gasket main body portion that is compressed toward the opposing surface by the end surface in the first member; a first annular convex portion that protrudes from the gasket main body portion toward the first member, is compressed toward the opposing surface by the chamfered portion, and is constituted by a curved surface tapered toward a tip thereof; and a second annular convex portion that protrudes from the gasket main body portion to an inner peripheral surface side, and is compressed toward radially outwardly by the body portion.

2 . The gasket according to claim 1 , wherein the gasket main body portion is compressed by an annular member disposed between the opposing surface and the gasket main body portion or an annular protruding portion formed on the opposing surface, and the end surface in the first member, and
the gasket further comprises a third annular convex portion that protrudes from the gasket main body portion toward an annular gap between the body portion and the annular member or the annular protruding portion, and is spaced apart from the opposing surface in a state before being compressed by the first member, and comes into close contact with the opposing surface when compressed by the first member.

3 . A sealing structure comprising:
a first member having an end surface and an insertion hole opened in the end surface and being formed with a chamfered portion between the end surface and an inner peripheral surface of the insertion hole; a second member having an opposing surface opposing the end surface and a body portion inserted into the insertion hole; and a gasket that is annular and made of rubber, and seals a gap between the first member and the second member to prevent gas leakage, wherein the gasket comprises: a gasket main body portion that s compressed toward the opposing surface by the end surface in the first member; a first annular convex portion that protrudes from the gasket main body portion toward the first member, is compressed toward the opposing surface by the chamfered portion, and is constituted by a curved surface tapered toward a tip thereof; and a second annular convex portion that protrudes from the gasket main body portion to an inner peripheral surface side, and is compressed toward radially outwardly by the body portion.

4 . The sealing structure according to claim 3 further comprising an annular member disposed between the opposing surface and the gasket main body portion,
wherein the gasket main body portion is compressed by the end surface in the first member and the annular member, and
the gasket further comprises a third annular convex portion that protrudes from the gasket main body portion toward an annular gap between the body portion and the annular member, and is spaced apart from the opposing surface in a state before being compressed by the first member, and comes into close contact with the opposing surface when compressed by the first member.

5 . The sealing structure according to claim 3 , wherein an annular protruding portion that protrudes toward the first member is formed on the opposing surface,
the gasket main body portion is compressed by the end surface in the first member and the annular protruding portion, and the gasket further comprises a third annular convex portion that protrudes from the gasket main body portion toward an annular gap between the body portion and the annular protruding portion, and is spaced apart from the opposing surface in a state before being compressed by the first member, and comes into close contact with the opposing surface when compressed by the first member.

Assignees

• Nok Corp

Inventors

• Yu Nan

Classifications

• F16J15/025 Primary

  and with at least one flexible lip · CPC title

• F16J15/062

  characterised by the geometry of the seat · CPC title

• F16L21/02

  with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings (F16L21/06, F16L21/08 take precedence; if adjustability is essential F16L27/00) · CPC title

• F16J15/106

  homogeneous · CPC title