US3773593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making hot gas manifold
Assignee: Lockheed Martin Corp
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Filing: 1971-03-25
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Granted: 1973-11-20
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Expires: 1991-03-25
Abstract
Abstract A lined manifold for carrying high temperature, high pressure gases for prolonged periods of time, with the liner portion of the manifold being prepared out of suitably reinforced thermosetting resin material or the like, that has been formed into a diameter in keeping with the inner diameter of the manifold, and brought to the partiallly cured condition. Thereafter, upon insertion into the metal portion of the manifold, the liner portion is usually caused to expand into firm contact therewith, and is then brought to the cure temperature so that the liner portion can be converted to the fully cured condition, and thus become an integral part of the manifold. We prefer to use preimpregnated bias cut tape made of high temperature materials in manufacturing the liners, for it is easier to work with, and less likely to burn and slough off when on the interior of a manifold than in the case of liners made of other types of tape or material. Manifolds made in accordance with this invention can be operated at a lower external temperature than can ordinary, unlined manifolds, and hence mounting and shielding problems are minimized.
Inventors
- 👤 J Casadevall
- 👤 J Arnold
- 👤 R Buzlea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:07
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/16; F01N13/14
Claims Analysis
Total Claims: 43
Claim 1
Independent Claim
14 words
The method as defined in claim 1 in which said curable resin is thermosetting.
Claim 2
Dependent Claim
14 words
The method as defined in claim 1 in which said curable resin is elastomeric.
Claim 3
Dependent Claim
25 words
The method as defined in claim 1 in which said liner is brought to a predetermined wall thickness before it is inserted in the manifold.
Claim 4
Dependent Claim
32 words
The method as defined in claim 1, in which the fibers of said high temperature resistant material in said liner are oriented at an acute angle to the axis of said liner.
Claim 5
Dependent Claim
16 words
The method as defined in claim 1, wherein said fibrous high temperature resistant material is silica.
Claim 6
Dependent Claim
16 words
The method as defined in claim 1, wherein said fibrous high temperature resistant material is quartz.
Claim 7
Dependent Claim
16 words
The method as defined in claim 1, wherein said fibrous high temperature resistant material is nylon.
Claim 8
Dependent Claim
19 words
The method as defined in claim 1, in which said expanding is using a bladder inserted into said liner.
Claim 9
Dependent Claim
28 words
The method as defined in claim 1 including storing said liner after the construction of said liner and prior to the insertion of the liner into the manifold.
Claim 10
Dependent Claim
27 words
The method as defined in claim 10, wherein part of said storage is at a temperature low enough to significantly retard the further curing of the resin.
Claim 11
Dependent Claim
17 words
The method as defined in claim 1, wherein said high temperature resistant material is a woven material.
Claim 12
Dependent Claim
19 words
The method as defined in claim 12, wherein said high temperature resistant material is a bias cut woven tape.
Claim 13
Independent Claim
140 words
ThE method of extending the useful life of a pipe contacting large quantities of hot fluids, comprising the steps of constructing a heat resistant elongated tubular member by wrapping on a mandrel a number of turns of a tape of a fibrous high temperature resistant material impregnated with a thermally curable resin such that the turns overlap to some extent; heating to partially cure the resin so as to cause the turns of the tape to adhere together and form a flexible tubular member; removing the tubular member from the mandrel; assembling said tubular member and said conduit; causing said tubular member to firmly contact the walls of said pipe; and heating the tubular member and pipe to such an extent that the resin of the tubular member becomes fully cured and the tubular member is bonded to the pipe.
Claim 14
Dependent Claim
16 words
The method as defined in claim 14 in which said curable resin is an elastomeric resin.
Claim 15
Dependent Claim
16 words
The method as defined in claim 14 in which said curable resin is a thermosetting resin.
Claim 16
Dependent Claim
19 words
The method as defined in claim 14, in which said fibrous high temperature resistant material is quartz or silica.
Claim 17
Dependent Claim
18 words
The method as defined in claim 14, wherein said fibrous high temperature resistant material is a woven material.
Claim 18
Dependent Claim
19 words
The method as defined in claim 14, wherein said high temperature resistant material is a bias cut woven tape.
Claim 19
Dependent Claim
32 words
The method as defined in claim 14 including storing said tubular member between the removal of the tubular member from the mandrel and the assembly of the tubular member and the pipe.
Claim 20
Dependent Claim
27 words
The method as defined in claim 20, wherein part of said storage is at a temperature low enough to significantly retard the further curing of the resin.
Claim 21
Independent Claim
179 words
A method of rendering a tube highly resistant to a flow therethrough of high pressure, hot fluid by the utilization therein of a high temperature resistant liner, comprising the steps of wrapping upon a mandrel a number of turns of a tape of a fibrous high temperature resistant material impregnated with a thermally curable resin such that the turns overlap to some extent, thus evolving an elongated member of high temperature resistant material on the mandrel; in a vacuum, heating to partially cure the resin so as to cause the turns of the tape to adhere together and thus form the elongated member into a liner; removing the liner from the mandrel; inserting the liner into the interior of the tube so as to essentially line the tube; expanding said liner into firm contact with the interior walls of said tube; and exposing the tube and the liner for a length of time to a temperature sufficient to fully cure the resin of the liner and thus cause the liner to firmly adhere to the interior of the tube.
Claim 22
Dependent Claim
16 words
The method as defined in claim 1 in which said curable resin is an elastomeric resin.
Claim 23
Dependent Claim
16 words
The method as defined in claim 1 in which said curable resin is a thermosetting resin.
Claim 24
Dependent Claim
22 words
The method as defined in claim 22, in which each turn of said tape slightly overlaps each preceding turn of said tape.
Claim 25
Dependent Claim
29 words
The method as defined in claim 22 including storing said liner between the removal of the liner from the mandrel and the insertion of the liner into the tube.
Claim 26
Dependent Claim
27 words
The method as defined in claim 26, wherein part of said storage is at a temperature low enough to significantly retard the further curing of the resin.
Claim 27
Dependent Claim
36 words
The method as defined in claim 22, in which said expanding is by using means inside the liner when in the tube, to expand the liner outwardly into firm contact with the interior of the tube.
Claim 28
Dependent Claim
17 words
The method as defined in claim 28 in which said high temperature resistant material is nylon fibers.
Claim 29
Dependent Claim
23 words
The method as defined in claim 28, in which said tape is wrapped at a acute angle to the axis of said mandrel.
Claim 30
Dependent Claim
15 words
The method as defined in claim 28 in which said material is bias cut tape.
Claim 31
Dependent Claim
17 words
The method as defined in claim 31, in which said tape is silica tape or quartz tape.
Claim 32
Independent Claim
166 words
A method of extending the useful life of a manifold through which large quantities of hot gas are to flow, said manifold having at least one inlet port and at least one outlet port, comprising the steps of wrapping upon a mandrel, numerous turns of a fibrous high temperature resistant tape that have been impregnated with a thermally curable resin such that the turns overlap to some extent; heating to partially cure the resin, thus causing the turns of tape to bond together and form a somewhat flexible liner; disposing portions of said liner in said inlet and outlet port as well as along the length of said manifold; causing said liner to firmly contact the inner walls of said inlet and outlet ports as well as the inner walls along the length of said manifold; and then exposing the manifold and the various liner portions to a temperature sufficient to fully cure the resin and bond the liner portions into permanent positions in the manifold.
Claim 33
Dependent Claim
62 words
The method as defined in claim 33, wherein said walls are firmly contacted by expanding said various liner portions outwardly into firm contact with the inner walls of the manifold and inlet and outlet ports, such that when the resin of the various liner portions reaches the fully cured condition, the liner portions will have become an integral part of the manifold.
Claim 34
Dependent Claim
47 words
The method as defined in claim 33 in which two different type tapes are used in constructing a liner, each cut on the bias, with one type tape being impregnated with a rubber modified phenolic resin, and the other impregnated with a hard char forming phenolic resin.
Claim 35
Dependent Claim
49 words
The method as defined in claim 33 in which the direction of wrap of the liner portions is such that the hot gas flowing therethrough tends to hold the turns of tape tightly against the interior of the manifold, rather than trying to disrupt the position of the turns.
Claim 36
Dependent Claim
29 words
The method as defined in claim 33 including storing said liner between the removal of the liner from the mandrel and the insertion of the liner into the manifold.
Claim 37
Dependent Claim
27 words
The method as defined in claim 37, wherein part of said storage is at a temperature low enough to significantly retard the further curing of the resin.
Claim 38
Dependent Claim
20 words
The method as defined in claim 33 in which said fibrous high temperature resistant tape is bias cut silica tape.
Claim 39
Dependent Claim
15 words
The method as defined in claim 39, wherein said tape is capable of considerable elongation.
Claim 40
Dependent Claim
20 words
The method as defined in claim 33 in which said fibrous high temperature resistant tape is bias cut quartz tape.
Claim 41
Dependent Claim
15 words
The method as defined in claim 41, wherein said tape is capable of considerable elongation.
Claim 42
Dependent Claim
16 words
The method as defined in claim 33 in which said curable resin is a thermosetting resin.
Claim 43
Dependent Claim
18 words
The method as defined in claim 43 in which said thermosetting resin is a rubber modified phenolic resin.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-19 | 1977-05-21 | 1977-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-19 | 1981-05-21 | 1981-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-19 | 1985-05-21 | 1985-11-20 | $7700.00 | Window Closed / Lapsed |