US3832978A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubing for a combustion chamber
Assignee: —
•
Filing: 1973-03-22
•
Granted: 1974-09-03
•
Expires: 1993-03-22
Abstract
Abstract The tubing is formed with a developed surface so that the number of tubes passing out of the side edges of the rectangular surfaces of the funnel-shaped bottom is equal to the number of tubes passing out of the adjacent side edges of the trapezoidal surfaces. The angle of the tubes at entry into the four surfaces of the funnel-shaped bottom can also be the same as the tube angle in the vertical walls of the combustion chamber.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:22
CPC Classifications
F; F22; F22B; F22B37/00; F22B37/02; F22B37/10; F22B37/14; F22B37/146
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
156 words
Tubing for a vertical combustion chamber comprising 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 on a second angle ( Alpha '') from said four surfaces into four other surfaces for forming a funnel-shaped bottom including two oppositely disposed rectangular surfaces inclined at a third angle ( Alpha ) from a horizontal plane and two oppositely disposed vertically oriented trapezoidal surfaces, said angles defining a relationship of Alpha 90* - 2 ( Alpha ''), at least part of said tubes within each said rectangular surface being bent to extend toward a lower edge of said rectangular surface with the number of tubes extending to a vertical edge of said rectangular surface being equal to the number of tubes extending to an adjacent edge of an adjacent trapezoidal surface.
Claim 2
Dependent Claim
156 words
Tubing for a vertical combustion chamber comprising 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 on a second angle ( Alpha '') from said four surfaces into four other surfaces for forming a funnel-shaped bottom including two oppositely disposed rectangular surfaces inclined at a third angle ( Alpha ) from a horizontal plane and two oppositely disposed vertically oriented trapezoidal surfaces, said angles defining a relationship of Alpha 90* - 2 ( Alpha ''), at least part of said tubes within each said rectangular surface being bent to extend toward a lower edge of said rectangular surface with the number of tubes extending to a vertical edge of said rectangular surface being equal to the number of tubes extending to an adjacent edge of an adjacent trapezoidal surface.
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
23 words
Tubing as set forth in claim 1 wherein said third angle ( Alpha '') is equal to said second angle ( Beta ).
Claim 5
Dependent Claim
16 words
Tubing as set forth in claim 1 wherein said third angle ( Alpha '') is 20*.
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 |