US3630651A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual vortex burner
Assignee: United States Department of the Air Force
•
Filing: 1970-05-14
•
Granted: 1971-12-28
•
Expires: 1990-05-14
Abstract
Abstract A dual vortex gaseous burner having a vortex tube, a separator tube, a pair of vortex chambers and an igniter. An oxidizer is injected tangentially through a jet in one of the vortex chambers forming a primary vortex between the separator tube and the vortex tube wall, while a fuel is injected tangentially through a jet in the other vortex chamber forming a secondary vortex between the igniter and the separator tube. An electric spark from the igniter produces ignition of the oxidizer and fuel at the boundary between the two vortices.
Inventors
- 👤 Richard J Fay
- 👤 James P Kottenstette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:55
CPC Classifications
F; F23; F23D; F23D14/00; F23D99/00; F23D99/002; F23D99/004; F23D2206/00; F23D2206/0094
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
108 words
A dual vortex gaseous burner comprising a vortex tube, a pair of concentric vortex chambers mounted at one end of said vortex tube, a separator tube mounted between said pair of chambers, an igniter mounted within said separator tube and an end restriction mounted in the other end of said tube, means for injecting an oxidizer tangentially through one of said pair of vortex chambers forming a primary vortex in said vortex tube, means for injecting a fuel tangentially through the other of said vortex chambers forming a secondary vortex in said vortex tube, said separator tube initially separating said primary vortex from said secondary vortex before ignition.
Claim 2
Dependent Claim
108 words
A dual vortex gaseous burner comprising a vortex tube, a pair of concentric vortex chambers mounted at one end of said vortex tube, a separator tube mounted between said pair of chambers, an igniter mounted within said separator tube and an end restriction mounted in the other end of said tube, means for injecting an oxidizer tangentially through one of said pair of vortex chambers forming a primary vortex in said vortex tube, means for injecting a fuel tangentially through the other of said vortex chambers forming a secondary vortex in said vortex tube, said separator tube initially separating said primary vortex from said secondary vortex before ignition.
Claim 3
Dependent Claim
22 words
A dual vortex gaseous burner as defined in claim 1 wherein each of said vortex chambers has a plurality of slots therein.
Claim 4
Dependent Claim
24 words
A dual vortex gaseous burner as defined in claim 2 wherein said igniter is an electric igniter comprising an electrode and a Tesla coil.
Claim 5
Dependent Claim
19 words
A dual vortex gaseous burner as defined in claim 3 wherein said end restriction is of a conical configuration.
Claim 6
Dependent Claim
21 words
A dual vortex gaseous burner as defined in claim 4 wherein said conical end restriction has a liquid coolant running therethrough.
Claim 7
Dependent Claim
19 words
A dual vortex gaseous burner as defined in claim 5 wherein said vortex tube is made of beryllium oxide.
Claim 8
Dependent Claim
21 words
A dual vortex gaseous burner as defined in claim 5 wherein said oxidizer is pure oxygen and said fuel is propane.
Claim 9
Dependent Claim
18 words
A dual vortex gaseous burner as defined in claim 5 wherein said vortex tube is made of inconel.
Claim 10
Dependent Claim
18 words
A dual vortex gaseous burner as defined in claim 5 wherein said vortex tube is made of LT-1.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |