Patent US3840332A successfully refreshed from Google Patents.
US3840332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion chambers
Assignee: Stone Platt Crawley Ltd
•
Filing: 1973-03-05
•
Granted: 1974-10-08
•
Expires: 1993-03-05
Abstract
Abstract In a combustion chamber of the flame tube type in which air is intimately mixed with a fuel spray, the air being split into primary and secondary flow paths which enter the combustion chamber at different points along its length, the flame tube is formed of two independently supported tube lengths which define between them the inlet for the secondary air flow.
Inventors
- 👤 P Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:14
CPC Classifications
F; F23; F23C; F23C3/00; F23C7/00; F23C7/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
170 words
A combustion chamber of the flame tube type in which air is intimately mixed with a fuel spray, the air being split into primary and secondary flow paths which enter the combustion chamber at different points along its length, the combustion chamber comprising two tube lengths disposed in alignment with one another and having their adjacent ends longitudinally spaced from each other to define between said adjacent ends a slot constituting the inlet for the secondary air flow, a supporting structure including a casing surrounding said tube lengths for supplying air to said combustion chamber, a mounting structure for independently supporting said tube lengths on said supporting structure, said mounting structure including means for holding said adjacent ends of said aligned tube lengths against longitudinal movement relative to one another to maintain constant the longitudinal width of said slot, said mounting structure further including means for permitting the remote ends of said tube lengths to move longitudinally relative to one another upon occurrence of thermal expansion of said tube lengths.
Claim 2
Dependent Claim
170 words
A combustion chamber of the flame tube type in which air is intimately mixed with a fuel spray, the air being split into primary and secondary flow paths which enter the combustion chamber at different points along its length, the combustion chamber comprising two tube lengths disposed in alignment with one another and having their adjacent ends longitudinally spaced from each other to define between said adjacent ends a slot constituting the inlet for the secondary air flow, a supporting structure including a casing surrounding said tube lengths for supplying air to said combustion chamber, a mounting structure for independently supporting said tube lengths on said supporting structure, said mounting structure including means for holding said adjacent ends of said aligned tube lengths against longitudinal movement relative to one another to maintain constant the longitudinal width of said slot, said mounting structure further including means for permitting the remote ends of said tube lengths to move longitudinally relative to one another upon occurrence of thermal expansion of said tube lengths.
Claim 3
Dependent Claim
61 words
A combustion chamber as claimed in claim 1, wherein said mounting structure comprises first mounting brackets disposed closely adjacent the slot and constructed to hold the flame tube lengths against longitudinal movement, said mounting structure further including second mounting brackets spaced longitudinally from said slot and constructed to permit longitudinal movement of the flame tube lengths relatively to the supporting structure.
Claim 4
Dependent Claim
35 words
A combustion chamber as claimed in claim 2, wherein said first and second mounting brackets are each constructed to permit thermal expansion of the flame tUbe lengths in radial directions relative to the supporting structure.
Claim 5
Dependent Claim
42 words
A combustion chamber as claimed in claim 1 wherein said mounting structure includes means for selectively varying the longitudinal position of at least one of the flame tube lengths relative to said supporting structure to adjust the longitudinal width of said slot.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |