US3876367A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary furnace
Assignee: Individual
•
Filing: 1973-08-02
•
Granted: 1975-04-08
•
Expires: 1993-08-02
Abstract
Abstract A rotary roasting furnace operated at high temperature and wherein to cool the furnace casing and thus extend its service life, a system of pipes is arranged concentrically between the shell and the casing of the furnace. The pipe system is mounted on circular ribs enveloping the furnace casing with a gap and resting on respective supports independent of the furnace. The system that mounts the cooling pipes does not interfere with furnace rotation, and this rotation, in turn, does not interfere with the operation of the cooling pipe system.
Inventors
- 👤 Leonid Tobiasovi Vorobeichikov
- 👤 Vladimir Ivanovich Satarin
- 👤 Ilyas Bachmirzov Tljustangelov
- 👤 Grigory Nikolaevich Gorbanev
- 👤 Anatoly Nikonovich Bevz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 01:44
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/38
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
157 words
A rotary furnace comprising: a rotatable furnace casing, a stationary shell enclosing said casing and including a succession of longitudinal sections surrounding said casing, circular ribs surrounding said casing, said ribs being accommodated between and secured to the sections of said shell, said ribs being spaced from said casing, fixed support means independent of said casing and supporting said ribs, said sections each including a system of cooling pipes extending longitudinally with respect to said casing and having a cooling liquid circulating therein, said pipes being mounted on said circular ribs parallel to the axis of rotation of said furnace casing and concentrically enveloping said casing, said sections of the shell further including louvers with flaps, means rotatably mounting said flaps on said circular ribs and surrounding said cooling pipes, said flaps comprising heat insulative material and actuating means connected to said flaps for varying the angular position thereof and the degree of opening of the louvers.
Claim 2
Dependent Claim
157 words
A rotary furnace comprising: a rotatable furnace casing, a stationary shell enclosing said casing and including a succession of longitudinal sections surrounding said casing, circular ribs surrounding said casing, said ribs being accommodated between and secured to the sections of said shell, said ribs being spaced from said casing, fixed support means independent of said casing and supporting said ribs, said sections each including a system of cooling pipes extending longitudinally with respect to said casing and having a cooling liquid circulating therein, said pipes being mounted on said circular ribs parallel to the axis of rotation of said furnace casing and concentrically enveloping said casing, said sections of the shell further including louvers with flaps, means rotatably mounting said flaps on said circular ribs and surrounding said cooling pipes, said flaps comprising heat insulative material and actuating means connected to said flaps for varying the angular position thereof and the degree of opening of the louvers.
Claim 3
Dependent Claim
31 words
A furnace as claimed in claim 1 comprising stationary deflector means disposed between said pipes and louvers and surrounding said pipes for reflecting heat radiated from said furnace onto said pipes.
Claim 4
Dependent Claim
16 words
A furnace as claimed in claim 2 wherein said deflector means is supported from said pipes.
Claim 5
Dependent Claim
16 words
A furnace as claimed in claim 3 wherein said deflector means is supported from said shell.
Claim 6
Dependent Claim
25 words
A furnace as claimed in claim 2 wherein said pipes are tapered longitudinally, said deflector means being mounted at the widest portion of the pipes.
Claim 7
Dependent Claim
27 words
A furnace as claimed in claim 2 comprising metal cooling brushes secured to said pipes along the lengths thereof and contacting said casing to promote heat exchange.
Claim 8
Dependent Claim
31 words
A furnace as claimed in claim 5 wherein the taper of the pipes is such that the ratio of the widest portion of a coil to the narrowest portion is 3:1.
References Cited (Backward Citations)
US1698313A
Cited
US1953856A
Cited
US2359923A
Cited
US2507295A
Cited
US2980403A
Cited
US3034776A
Cited
US3021127A
Cited
US3144905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-07 | 1978-10-07 | 1979-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-07 | 1982-10-07 | 1983-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-07 | 1986-10-07 | 1987-04-08 | $7700.00 | Window Closed / Lapsed |