Seal structure

• US 4,192,520 A
• Filed: 05/19/1978
• Issued: 03/11/1980
• Est. Priority Date: 01/30/1978
• Status: Expired due to Term

• Current Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hasegawa, Tadao
• Primary Examiner(s): Ward, Jr., Robert S.
• Application Number:
  US05/907,754
• Time in Patent Office: 662 Days
• Field of Search: 277/34, 277/165, 277/166, 277/167.5, 277/170-172, 277/189, 277/207 A, 277/235 B, 277/207 R
• US Class Current: 277/591
• CPC Class Codes: F02F 7/006 Camshaft or pushrod housings
• CPC Class Codes: F16J 15/022 characterised by structure or material
• CPC Class Codes: F16J 15/024 the packing being locally weakened in order to increase elasticity

Abstract

A sealing structure including a substantially flat sealing surface, a gasket and a groove formed in a flange facing the sealing surface for the gasket and for applying a sealing force to the gasket in a direction substantially perpendicular to the sealing surface. A groove is formed such that the groove has inclined surfaces with the width of the groove increasing towards the sealing surface and such that the inclined surfaces apply a pressing force to the gasket.

Claims

1. A sealing structure including a substantially flat sealing surface, a gasket and a groove formed in a flange facing the sealing surface for the gasket and for applying a sealing force to the gasket in a direction substantially perpendicular to the sealing surface, wherein a groove is formed such that the groove has inclined surfaces with the width of the groove increasing towards the sealing surface and such that the inclined surfaces apply a pressing force to the gasket and wherein contacting points along a cross section of the gasket and the sealing surface are closer to the center of the gasket than are the respective centers of the inclined surfaces in the groove.

2. A sealing structure according to claim 1, wherein the angle of inclination of the inclined surface is substantially 30 degrees.

3. A sealing structure according to claim 1 or 2, wherein the inclined surfaces are plain.

4. A sealing structure according to claim 1 or 2, wherein the inclined surfaces are curved.

5. A sealing structure according to claim 1 or 2 wherein, a space is formed in the bottom of the groove for adjusting errors in the dimensions of the gasket.

6. A sealing structure according to claim 1 or 2, wherein a gasket is in contact with the sealing surface at one point in a cross sectional view of the gasket, when a sealing force is applied to the gasket.

7. A sealing structure according to claim 1 or 2, wherein a gasket is in contact with the sealing surface at two points in a cross sectional view of the gasket, when a sealing force is applied to the gasket.

8. A sealing structure including a substantially flat sealing surface, a gasket and a groove formed in a flange facing the sealing surface for the gasket and for applying a sealing force to the gasket in a direction substantially perpendicular to the sealing surface, wherein a groove is formed such that the groove has inclined surfaces with the width of the groove increasing towards the sealing surface and such that the inclined surfaces apply a force to the gasket and wherein notches are formed in the gasket to prevent the gasket from coming into contact with each edge lines of the groove.