US3754398A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermal engine exhaust reactor with over-temperature protection
Assignee: Motors Liquidation Co
•
Filing: 1971-12-27
•
Granted: 1973-08-28
•
Expires: 1991-12-27
Abstract
Abstract A thermal reactor preferably having in a preferred embodiment, an insulated reaction chamber in which engine exhaust gases are exothermically reacted to reduce undesirable exhaust emissions. The inner liner of the reaction chamber is protected against overheating during temporary periods of excessive temperature operation by surrounding the outer surfaces of the liner with a fusible material having a melting point between the normal operating temperature of the reactor and the maximum operating temperature. The latent heat of fusion of the fusible material acts as a heat sink, absorbing heat upon melting of the material so as to maintain the walls of the inner liner below their maximum operating temperatures during temporary periods of abnormally high temperature operation due to engine malfunction or the like.
Inventors
- 👤 J Mattavi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 11:41
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/08; F01N3/10; F01N3/24; F01N3/26; F01N2240/00; F01N2240/10; Y; Y10; Y10S; Y10S165/00; Y10S165/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
For use with an internal combustion engine a thermal reactor device for removing undesirable substances from the engine exhaust gases, said thermal reactor comprising an inner liner defining a high temperature reaction chamber, an outer housing, spacedly surrounding said inner liner and defining an enclosed space therebetween, and a fusible heat absorbing material within said enclosed space and contacting the outer surfaces of said inner liner that are exposed to said space, said heat absorbing material being selected from the group of metal salts consisting of magnesium fluoride and magnesium silicide and having a melting temperature which is greater than the normal operating temperature of the inner liner surfaces it contacts and which is below the desired maximum operating temperatures of said surfaces whereby, during operation of said thermal reactor at excessive reaction temperatures, said inner liner wall is maintained below its maximum operating temperature by melting of said fusible material.
Claim 2
Dependent Claim
151 words
For use with an internal combustion engine a thermal reactor device for removing undesirable substances from the engine exhaust gases, said thermal reactor comprising an inner liner defining a high temperature reaction chamber, an outer housing, spacedly surrounding said inner liner and defining an enclosed space therebetween, and a fusible heat absorbing material within said enclosed space and contacting the outer surfaces of said inner liner that are exposed to said space, said heat absorbing material being selected from the group of metal salts consisting of magnesium fluoride and magnesium silicide and having a melting temperature which is greater than the normal operating temperature of the inner liner surfaces it contacts and which is below the desired maximum operating temperatures of said surfaces whereby, during operation of said thermal reactor at excessive reaction temperatures, said inner liner wall is maintained below its maximum operating temperature by melting of said fusible material.
Claim 3
Dependent Claim
41 words
The reactor of claim 1 wherein said enclosed space between said inner liner and outer housing includes an expansion volume above the level of said inner liner to provide for expansion of said fusible material due to a change of state.
Claim 4
Dependent Claim
23 words
The reactor of claim 1 and further comprising heat insulating means surrounding said outer housing and adapted to prevent excessive heat flow therefrom.
References Cited (Backward Citations)
US2574190A
Cited
US2956637A
Cited
US3137132A
Cited
US3470689A
Cited
US3665711A
Cited
US3645093A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |