US3877126A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of line and/or space for receiving or conducting hot gases
Assignee: Daimler Benz AG
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Filing: 1973-06-06
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Granted: 1975-04-15
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Expires: 1993-06-06
Abstract
Abstract A process of manufacturing a construction for accommodating a high temperature medium, particularly for the accommodation and/or conduction of hot gases in connection with exhaust gas lines and/or combustion spaces of internal combustion engines. The process includes forming a heat resistant sheet metal liner with predetermined fold lines and placing the liner inside of an unfinished relatively rigid structure so as to be in engagement with inside walls of the structure. Subsequent thereto, the structure is casted and cooled such that the inside walls contract and force the bending of the liner along the fold lines such that insulating air spaces are formed between the liner and the inside walls adjacent the fold lines.
Inventors
- 👤 Herbert Deutschmann
- 👤 Wolfgang Kurczek
- 👤 Lazzer Karl-Heinz De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:35
CPC Classifications
F; F01; F01N; F01N13/00; F01N13/08; F01N13/10; F01N13/102; B; B22; B22D; B22D19/00; F01N3/00; F01N3/02; F01N3/04; F01N3/043; F01N3/046; F02; F02B; F02B37/00; F02B37/02; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49229; Y10T29/49231; Y10T29/49398; Y10T29/49826; Y10T29/49863
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
160 words
A process of manufacturing a construction for handling high temperature mediums comprising: forming a construction for accommodating a high temperature medium by the steps of casting a rigid structure for said construction, arranging a heat resistant sheet liner prior to said casting of said rigid structure so that said rigid structure and sheet liner are formed during said casting step into said construction with said sheet liner disposed inside said rigid structure, said sheet liner having a plurality of predetermined fold lines, and cooling the thus formed construction of rigid structure and sheet liner to form a plurality of separate insulating air spaces between inside walls of said rigid structure and outer peripheral walls of said sheet liner, said plurality of insulating air spaces being formed by bending said sheet liner along said fold lines, thereby forming said plurality of insulating air spaces between alternate Ones of said plurality of fold lines and said inside walls of said rigid structure.
Claim 2
Dependent Claim
160 words
A process of manufacturing a construction for handling high temperature mediums comprising: forming a construction for accommodating a high temperature medium by the steps of casting a rigid structure for said construction, arranging a heat resistant sheet liner prior to said casting of said rigid structure so that said rigid structure and sheet liner are formed during said casting step into said construction with said sheet liner disposed inside said rigid structure, said sheet liner having a plurality of predetermined fold lines, and cooling the thus formed construction of rigid structure and sheet liner to form a plurality of separate insulating air spaces between inside walls of said rigid structure and outer peripheral walls of said sheet liner, said plurality of insulating air spaces being formed by bending said sheet liner along said fold lines, thereby forming said plurality of insulating air spaces between alternate Ones of said plurality of fold lines and said inside walls of said rigid structure.
Claim 3
Dependent Claim
31 words
The process of claim 1, wherein said rigid structure is a longitudinally extending duct structure, and wherein said fold lines are formed to extend longitudinally along the liner and duct structure.
Claim 4
Dependent Claim
27 words
The process of claim 2, wherein the inside walls of said duct structure are formed with inwardly projecting portions for aiding in the bending of said liner.
Claim 5
Dependent Claim
21 words
The process of claim 2, wherein the liner is formed of heat-resistant steel and the duct structure is formed of aluminum.
Claim 6
Dependent Claim
24 words
The process of claim 2, wherein said liner contacts said duct exclusively at said alternate fold lines forming the edges of adjacent air spaces.
Claim 7
Dependent Claim
26 words
The process according to claim 2, wherein said duct structure includes an inside duct and an outer casing having portions forming a cooling water space therebetween.
Claim 8
Dependent Claim
30 words
The process according to claim 1, wherein said construction is an exhaust gas manifold construction for an internal combustion engine, and wherein said rigid structure is an exhaust duct structure.
Claim 9
Dependent Claim
14 words
The process according to claim 7, wherein said liner is a sheet metal liner.
Claim 10
Dependent Claim
21 words
The process according to claim 8, wherein said fold lines are formed to extend longitudinally along the liner and duct structure.
Claim 11
Dependent Claim
28 words
The process according to claim 8, wherein the inside walls of said duct structure are formed with inwardly projecting portions for aiding in the bending of said liner.
Claim 12
Dependent Claim
22 words
The process according to claim 8, wherein the liner is formed of heat-resistant steel and the duct structure is formed of aluminum.
Claim 13
Dependent Claim
25 words
The process according to claim 8, wherein said liner contacts said duct exclusively at said alternate fold lines forming the edges of adjacent air spaces.
Claim 14
Dependent Claim
25 words
The process according to claim 9, wherein said liner contacts said duct exclusively at said alternate fold lines forming the edges of adjacent air spaces.
Claim 15
Dependent Claim
26 words
The process according to claim 8, wherein said duct structure includes an inside duct and an outer casing having portions forming a cooling water space therebetween.
Claim 16
Dependent Claim
26 words
The process according to claim 13, wherein said duct structure includes an inside duct and an outer casing having portions forming a cooling water space therebetween.
Claim 17
Dependent Claim
28 words
The process according to claim 15, wherein the inside walls of said duct structure are formed with inwardly projecting portions for aiding in the bending of said liner.
Claim 18
Dependent Claim
33 words
The process of claim 1, wherein said bending of said sheet liner along said fold lines is provided by contraction of said inside walls of said rigid structure during the step of cooling.
Claim 19
Dependent Claim
14 words
The process of claim 1, wherein said sheet liner contains said high temperature medium.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |