IP Library › Granted Patent US 7,328,685
Granted Patent B2
US 7,328,685 · App. 11/142,630 · Granted Feb 12, 2008

Slip joint exhaust manifolds

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Quick Facts
Patent No.
US 7,328,685
App. No.
11/142,630
Granted
Feb 12, 2008
Kind
B2
Abstract

A multi-piece exhaust manifold includes a ring seal between separate portions. The separate portions have generally cylindrical sealing surfaces formed thereon to mate with the ring seal. The ring seal may include a metal sheath filled with graphite or other sealing material.

Claims (23)

1. A multi-piece exhaust manifold comprising:

a portion having a hollow body with a larger outside diameter than a generally cylindrical end portion having a single outside radial surface;

another portion having a generally cylindrical inside radial surface; and

a metallic, continuous sealing ring interposed between said single outside radial surface and said inside radial surface.

2. The exhaust manifold of claim 1 , wherein said sealing ring is circumscribed within said generally cylindrical inside radial surface.

3. The exhaust manifold of claim 1 , wherein said sealing ring circumscribes at least a portion of said generally cylindrical outside radial surface.

4. The exhaust manifold of claim 1 , wherein said metallic ring includes a core, and said core includes a non-metallic material.

5. The exhaust manifold of claim 4 , wherein said core comprises a graphite.

6. The exhaust manifold of claim 4 , wherein said core comprises a mica based inorganic filler.

7. The exhaust manifold of claim 1 , wherein said core selectively expands when heated.

8. The exhaust manifold of claim 1 , wherein said portion does not contact said other portion during operation of the manifold.

9. The exhaust manifold of claim 1 , wherein said sealing ring is constructed, at least in part, of a softer material than said portion.

10. The exhaust manifold of claim 1 , wherein said sealing ring includes an outer wrap, and said outer wrap has an overlapping edge.

11. A sealing system for providing a seal between at least two components comprising:

a first component having a hollow body with a larger outside diameter than a generally cylindrical end portion having a single outside radial surface;

a second component having a generally cylindrical inside radial surface, wherein at least a portion of said generally cylindrical outside radial surface and at least a portion of said generally cylindrical inside radial surface are generally coaxial; and

a metallic, continuous sealing ring interposed between said single outside radial surface and said inside radial surface having a metal wrap at least partially enclosing a core.

12. The sealing system of claim 11 , wherein said core comprises a graphite.

13. The sealing system of claim 11 , wherein said core comprises a mica based inorganic filler.

14. The sealing system of claim 11 , wherein said core selectively expands when heated.

15. The sealing system of claim 11 , wherein said first component does not contact said second component during operation of said sealing system.

16. The sealing system of claim 11 , wherein said sealing ring is constructed, at least in part, of a softer material than said first component.

17. The sealing system of claim 11 , wherein said sealing ring includes an outer wrap, and said outer wrap has an overlapping edge.