US4607851A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making composite wire mesh seal
Assignee: Metex Corp USA
•
Filing: 1977-11-30
•
Granted: 1986-08-26
•
Expires: 1997-11-30
Abstract
Abstract A high temperature seal, particularly suitable for use in vehicle engine exhaust systems, is formed of a composite structure including refractory sheet material and wire mesh. In a typical application, the seal is disposed between confronting ends of an engine exhaust manifold pipe and an exhaust tail pipe, and permits relative rotation of the pipes without impairment of the effectiveness of the seal, thereby preventing leakage of high temperature exhaust gases passing through the joined pipes.
Inventors
- 👤 Peter P. Usher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:58
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/18; F01N13/1805; F01N13/1827; F01N13/16; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/12; F16J15/121; F16J15/126; F16L; F16L27/00; F16L27/02; F16L27/04; F16L27/053; F16L27/06; F16L27/073; Y; Y10; Y10S; Y10S277/00; Y10S277/924
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
A method of producing a substantially coherent high temperature composite seal comprising the steps of constructing a preform comprising flexible refractory sheet material aligned against flexible knitted wire mesh by convoluting of strip of refractory material with one or more overlying pieces of knitted wire mesh to form a generally cylindrical preform, said wire mesh being formed of wire and having voids of given size between said wires, disposing said preform in a compression die, said die having a cavity size and shape which is substantially the same as the desired composite seal, and applying an axial load to said preform, said load being of sufficient force to collapse said preform to substantially the size and shape of said composite seal and to cause said refractory material to substantially fill the openings in said wire mesh and to become firmly interlocked with said mesh.
Claim 2
Independent Claim
144 words
A method of producing a substantially coherent high temperature composite seal comprising the steps of constructing a preform comprising flexible refractory sheet material aligned against flexible knitted wire mesh by convoluting of strip of refractory material with one or more overlying pieces of knitted wire mesh to form a generally cylindrical preform, said wire mesh being formed of wire and having voids of given size between said wires, disposing said preform in a compression die, said die having a cavity size and shape which is substantially the same as the desired composite seal, and applying an axial load to said preform, said load being of sufficient force to collapse said preform to substantially the size and shape of said composite seal and to cause said refractory material to substantially fill the openings in said wire mesh and to become firmly interlocked with said mesh.
Claim 3
Dependent Claim
26 words
The method of claim 1 wherein said axial load is sufficient to cause the refractory material to substantially fill all air voids in said composite seal.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said seal is an endless ring.
Claim 5
Dependent Claim
36 words
The method of claim 3 wherein said seal is in the form of an exhaust seal comprising inner and outer radial surfaces adapted to engage surfaces on pipes and flanges to be joined to one another.
Claim 6
Dependent Claim
22 words
The method of claim 1, wherein the length of wire mesh corresponds to two or more circumferential lengths of the finished seal.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein the width of said mesh is two or more times the height of said finished seal.
Claim 8
Dependent Claim
12 words
The method of claim 1 wherein said refractory sheet material is graphite.
Claim 9
Dependent Claim
12 words
The method of claim 1 wherein said refractory sheet material is mica.
Claim 10
Independent Claim
162 words
A method of producing a substantially coherent high temperature exhaust seal adapted to sealingly engage confronting surfaces on pipes and flanges to be joined to one another to form a flexible joint comprising the steps of constructing a preform by convoluting a strip of flexible refractory sheet material with one or more overlying pieces of flexible knitted wire mesh, said wire mesh being formed of wire and having voids of given size between said wires, disposing said preform in a compression die, said die having a cavity size and shape which is substantially the same as the desired exhaust seal, and applying an axial load to said preform, said load being of sufficient force to collapse said preform to substantially the size and shape of said exhaust seal and to cause said refractory material to substantially fill the openings in said wire mesh and substantially all other air voids within said exhaust seal and to become firmly interlocked with said wire mesh.
Claim 11
Independent Claim
162 words
A method of producing a substantially coherent high temperature exhaust seal adapted to sealingly engage confronting surfaces on pipes and flanges to be joined to one another to form a flexible joint comprising the steps of constructing a preform by convoluting a strip of flexible refractory sheet material with one or more overlying pieces of flexible knitted wire mesh, said wire mesh being formed of wire and having voids of given size between said wires, disposing said preform in a compression die, said die having a cavity size and shape which is substantially the same as the desired exhaust seal, and applying an axial load to said preform, said load being of sufficient force to collapse said preform to substantially the size and shape of said exhaust seal and to cause said refractory material to substantially fill the openings in said wire mesh and substantially all other air voids within said exhaust seal and to become firmly interlocked with said wire mesh.
References Cited (Backward Citations)
US920502A
Cited
US1017674A
Cited
US1409148A
Cited
US1703725A
Cited
US1631668A
Cited
US1709837A
Cited
US1924657A
Cited
GB410734A
Cited
US2112545A
Cited
US2174431A
Cited
US2259609A
Cited
GB577316A
Cited
US2376039A
Cited
US2398210A
Cited
US2477267A
Cited
US2676823A
Cited
GB690906A
Cited
US2711334A
Cited
US2674644A
Cited
GB759373A
Cited
US2761203A
Cited
US2924471A
Cited
US2882082A
Cited
US3004780A
Cited
US2957717A
Cited
US3101994A
Cited
US3020185A
Cited
US3188115A
Cited
US3083734A
Cited
US3044922A
Cited
GB972650A
Cited
GB1004189A
Cited
US3404061A
Cited
US3271039A
Cited
US3275346A
Cited
US3556541A
Cited
US3481824A
Cited
GB1113320A
Cited
US3627357A
Cited
JPS4913626A
Cited
US3798903A
Cited
US3841289A
Cited
US4014557A
Cited
US4068853A
Cited
US4019244A
Cited
US4097071A
Cited
US4116451A
Cited
US4209177A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-25 | 1990-02-24 | 1990-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-25 | 1994-02-24 | 1994-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-25 | 1998-02-24 | 1998-08-26 | $7700.00 | Window Closed / Lapsed |