Seal device

• US 7,128,323 B2
• Filed: 08/11/2004
• Issued: 10/31/2006
• Est. Priority Date: 08/20/2003
• Status: Active Grant

• Current Assignee: Eagle Engineering Aerospace Co., Ltd.
• Original Assignee: Eagle Engineering Aerospace Co., Ltd.
• Inventors: Kasahara, Hidetoshi, Iguchi, Tetsuya, Hiromatsu, Jun
• Primary Examiner(s): PATEL, VISHAL A
• Application Number:
  US10/915,352
• Publication Number:
  US 20050057003A1
• Time in Patent Office: 811 Days
• Field of Search: 277/530, 277566-567, 277/603, 277/626, 277/628, 277/637, 277/644, 277647-650, 415135-136, 415138-139, 415/173.3, 415/174.2
• US Class Current: 277/644
• CPC Class Codes: F16J 15/0887 the sealing effect being obtained by elastic deformation of the packing

Abstract

Primary objective of the present invention is to provide a seal device wherein the seal surfaces of the device are always brought into close contact against the side walls of the mounting slot regardless of fluid conditions. The seal device has two seal portions located to both sides of a bight shaped elastic portion which has a “U”-shaped cross section wherein the respective seal portions have a first side portion and a second side portion. The second side portions of the seal portions abut against each other in a symmetric manner in order to form a “W”-shaped seal body element. The end portions of the both second side portions of the seal body element are joined and seal surfaces are defined on the outer side surfaces of the both first side portions.

Claims

1. A metallic seal device for effecting a seal by abutting against side walls defining a mounting slot, said seal device comprising:

a) a metallic first seal portion having a “

U”

-shaped cross-section and including a first elastic portion, and a first side portion and a second side portion on both sides of said first elastic portion;

b) a metallic second seal portion having a first elastic portion, a first side portion and a second side portion being arranged to have the same form as said first seal portion, wherein said elastic portion of said first and second seal portions is continuous along an entire length of the seal device; and

c) a joint portion joining an end portion of the second side portion of said first seal portion and an end portion of the second side portion of said second seal portion and bringing the second side portion of said first seal portion and the second side portion of said second seal portion into contact with each other in parallel;

wherein a first seal surface is defined on an outer side surface toward a distal end of the first side portion of said first seal portion and a second seal surface is defined on an outer side surface toward a distal end of the first side portion of said second seal portion.

2. A seal device as claimed in claim 1, wherein said elastic portion has an annular form and defines either radially inner circumference or radially outer circumference.

3. A seal device as claimed in claim 1, wherein a distal end portion of said first side portions radially or axially extend to a proximal region passing through said joint portion.

4. A seal device as claimed in claim 1, wherein said joint portion is defined by welding the end portions of the both second side portions or by clamping the end portions of the both second side portions with a “

U”

-sectioned clamping element.

5. A seal device as claimed in claim 1, wherein said both seal portions are made of a nickel based alloy material.

6. A seal device as claimed in claim 1, wherein said both seal portions have a support portion therebetween and said both seal portions are retained through said support portion by components defining the mounting slot.