Patent US4339187A successfully refreshed from Google Patents.
Patent US3832979A successfully refreshed from Google Patents.
US3832979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing for a combustion chamber
Assignee: Sulzer AG
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Filing: 1973-03-26
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Granted: 1974-09-03
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Expires: 1993-03-26
Abstract
Abstract The tubing is formed with a developed surface in which the tubes in the triangular sections are all parallel to one of the two equal sceles at an angle Alpha and all extend into the tubes of an adjacent rectangular surface via 90* bends. The tubes in the rectangular surfaces extend from the combustion chamber walls and the triangular surfaces at an angle gamma arc ctg (2 cos Alpha ) and are bent at intermediate points to extend uniformly to the lower edge of the respective rectangular surface.
Inventors
- 👤 H Ammann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:25
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/14; F22B37/146
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
213 words
Tubing for a vertical combustion chamber comprising four gas tight walls defining a rectangular cross-sectional shape and having a plurality of interconnected tubes inclined at a first angle ( Beta ) from a horizontal plane within four surfaces defining a rectangular cross-sectional shape for forming four walls of the combustion chamber, said tubes extending from said four surfaces into four other surfaces for forming a funnelshaped bottom including two oppositely disposed gas tight rectangular surfaces inclined at a second angle ( Alpha ) from a horizontal plane and two oppositely disposed gas tight verticaly oriented isosceles triangular surfaces, said tubes in each said triangular surface being disposed in parallel to one of the two equal sceles of said respective triangular surface and extending to an adjacent rectangular surface, said tubes in each rectangular surface extending in parallel from an adjacent wall of the combustion chamber and from an adjacent triangular surface initially at a third angle ( gamma ) to the edge formed by the rectangular surface and the adjacent wall, said third angle ( gamma ) being expressed as: gamma arc ctg (2 cos Alpha ) all of said tubes within said rectangular surface being bent to extend to a lower edge of said rectangular surface in parallel to said trianguLar surfaces.
Claim 2
Dependent Claim
213 words
Tubing for a vertical combustion chamber comprising four gas tight walls defining a rectangular cross-sectional shape and having a plurality of interconnected tubes inclined at a first angle ( Beta ) from a horizontal plane within four surfaces defining a rectangular cross-sectional shape for forming four walls of the combustion chamber, said tubes extending from said four surfaces into four other surfaces for forming a funnelshaped bottom including two oppositely disposed gas tight rectangular surfaces inclined at a second angle ( Alpha ) from a horizontal plane and two oppositely disposed gas tight verticaly oriented isosceles triangular surfaces, said tubes in each said triangular surface being disposed in parallel to one of the two equal sceles of said respective triangular surface and extending to an adjacent rectangular surface, said tubes in each rectangular surface extending in parallel from an adjacent wall of the combustion chamber and from an adjacent triangular surface initially at a third angle ( gamma ) to the edge formed by the rectangular surface and the adjacent wall, said third angle ( gamma ) being expressed as: gamma arc ctg (2 cos Alpha ) all of said tubes within said rectangular surface being bent to extend to a lower edge of said rectangular surface in parallel to said trianguLar surfaces.
Claim 3
Dependent Claim
39 words
Tubing as set forth in claim 1 wherein said bent tubes in each respective rectangular surface are each bent at a point located on a diagonal of said rectangular surface transversing all of said tubes in said rectangular surface.
Claim 4
Dependent Claim
50 words
Tubing as set forth in claim 1 wherein said first angle ( Alpha ) is expressed as: sin Alpha 1/(a/b + 1) wherein a equals the width of said wall above one of said triangular surfaces and b equals the width of said wall above one of said rectangular surfaces.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |