US4002157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas turbine heating apparatus
Assignee: JOHN R HOLLINGSWORTH CO
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Filing: 1974-12-31
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Granted: 1977-01-11
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Expires: 1994-12-31
Abstract
Abstract This heating apparatus includes an air flow chamber having outer and inner, generally cylindrical and parallel walls within which a combustion chamber is nested. The combustion chamber includes means for burning a fuel and has outer and inner parallel, generally cylindrical heat conducting walls. It is coupled to an exhaust duct which has at least a portion thereof surrounded by the inner wall of the air flow chamber. In one form air is driven by an electric fan through the air flow chamber around the combustion chamber and out to a distribution duct. The fan also blows air into the combustion chamber for combustion of the fuel. In another form, a fan is driven by th combustion exhaust gases thereby propelling air through the air flow chamber and into the combustion chamber via a compressor wheel. Other forms include heat-conductive members placed into contact with the exhaust duct or with the air chamber to further heat the air before it enters the distribution duct. Yet another form includes a heat-conductive coil disposed in the exhaust duct to extract heat from the exhaust and to apply it to a fluid circulating through the coil.
Inventors
- 👤 Rene A. M Toesca
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:23
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/34; F23D14/36; F23L; F23L5/00; F23L5/02; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065; F24H6/00; F23L2900/00; F23L2900/05021
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
137 words
Heating apparatus comprising: a. a combustion chamber having walls formed to cause exhaust gas to travel initially in a first direction and then to travel in a second direction opposite thereto, b. an air flow chamber adjacent thereto and being formed to conduct incoming air first past the outer wall of said combustion chamber in said first direction, and then past the inner wall of said combustion chamber in said second direction, and c. means for causing air to enter said apparatus and for causing a first portion thereof to circulate through said air flow chamber whereupon it is heated by the walls of said combustion chamber prior to its being applied to heat a predetermined area, said means also causing a second portion of said air to enter said combustion chamber thereby to enable combustion therein.
Claim 2
Dependent Claim
137 words
Heating apparatus comprising: a. a combustion chamber having walls formed to cause exhaust gas to travel initially in a first direction and then to travel in a second direction opposite thereto, b. an air flow chamber adjacent thereto and being formed to conduct incoming air first past the outer wall of said combustion chamber in said first direction, and then past the inner wall of said combustion chamber in said second direction, and c. means for causing air to enter said apparatus and for causing a first portion thereof to circulate through said air flow chamber whereupon it is heated by the walls of said combustion chamber prior to its being applied to heat a predetermined area, said means also causing a second portion of said air to enter said combustion chamber thereby to enable combustion therein.
Claim 3
Dependent Claim
44 words
The heating apparatus according to claim 1 wherein said (c) means comprises a compressor wheel and a turbine wheel mounted for rotation in unison, said turbine wheel being driven by the exhaust gases generated by the combustion of said fuel in said combustion chamber.
Claim 4
Dependent Claim
26 words
The heating apparatus according to claim 2 wherein said (c) means includes a fan also mounted for rotation in unison with said compressor and turbine wheels.
Claim 5
Dependent Claim
41 words
The heating apparatus according to claim 1 wherein said combustion chamber is formed so that the exhaust gases of said combustion first travel in one direction generally parallel to the axis of said apparatus and then travel in the opposite direction.
Claim 6
Dependent Claim
28 words
The apparatus according to claim 1 with the addition of an exhaust duct disposed along the axis of said apparatus and being in communication with said combustion chamber.
Claim 7
Dependent Claim
28 words
The apparatus according to claim 5 with the addition of heat-conductive means disposed within and along said exhaust duct to facilitate heating of a fluid within said duct.
Claim 8
Dependent Claim
39 words
The apparatus according to claim 1 wherein said (c) means is constructed to cause the amount of said second portion of air to be such that the air-fuel ratio in said combustion chamber is allowed to approach stoichiometric conditions.
Claim 9
Dependent Claim
51 words
The apparatus according to claim 6 wherein said duct is associated with means adjacent thereto for conducting outwardly heat from the walls thereof and wherein said air flow chamber includes a region adjacent said exhaust duct so that said first portion flows around said heat-conducting means associated with said exhaust duct.
Claim 10
Dependent Claim
21 words
The apparatus according to claim 8 wherein said associated heat-conducting means includes a plurality of vanes in contact with said duct.
Claim 11
Dependent Claim
68 words
The apparatus according to claim 1 with the addition of a plurality of heat-conductive tubes arranged in communication with said air flow chamber so that heated air therefrom flows through said tubes and with the addition of means coupled to said combustion chamber for directing the hot exhaust gases therefrom into contact with the outer surfaces of said tubes before said exhaust gases are withdrawn from said apparatus.
Claim 12
Dependent Claim
40 words
Heating apparatus according to claim 1 wherein said combustion chamber is divided into two generally concentric regions by a generally cylindrical wall and wherein said air flow chamber is substantially divided into two generally concentric regions by said combustion chamber.
Claim 13
Dependent Claim
83 words
Heating apparatus according to claim 1 wherein said air flow chamber is formed so that said incoming air, after flowing in said air flow chamber in said second direction, is then made to flow in said first direction again just before it is conducted out of said heating apparatus to heat said predetermined area, the flow of said air in said air chamber being generally increasingly closer to the axis of said apparatus from the beginning to the end of its path therein.
Claim 14
Dependent Claim
191 words
Heating apparatus comprising: a. a chamber having outer and inner, generally cylindrical and parallel walls, b. a combustion chamber disposed within said (a) chamber and including means for continuously burning a fuel in air therein, said chamber having outer and inner parallel, generally cylindrical, heat-conducting walls, c. an exhaust duct having a substantial portion thereof surrounded by the inner wall of said (a) chamber, said duct having a heat-conductive wall communicating with said (b) chamber, d. means for causing air to enter said apparatus, said means including: 1. means to cause a portion of said air to flow through said (a) chamber and along the outer surface of the heat-conducting wall of said exhaust duct when combustion of said fuel has heated the heat-conducting wall of said combustion chamber, said air thereupon being heated and being adapted to be applied to heat a predetermined area, and 2. means for causing another portion of said air to enter said combustion chamber thereby to enable combustion of said fuel to occur, the amount of said other portion being such that the air-fuel ratio in said combustion chamber is allowed to approach stoichiometric conditions.
Claim 15
Dependent Claim
191 words
Heating apparatus comprising: a. a chamber having outer and inner, generally cylindrical and parallel walls, b. a combustion chamber disposed within said (a) chamber and including means for continuously burning a fuel in air therein, said chamber having outer and inner parallel, generally cylindrical, heat-conducting walls, c. an exhaust duct having a substantial portion thereof surrounded by the inner wall of said (a) chamber, said duct having a heat-conductive wall communicating with said (b) chamber, d. means for causing air to enter said apparatus, said means including: 1. means to cause a portion of said air to flow through said (a) chamber and along the outer surface of the heat-conducting wall of said exhaust duct when combustion of said fuel has heated the heat-conducting wall of said combustion chamber, said air thereupon being heated and being adapted to be applied to heat a predetermined area, and 2. means for causing another portion of said air to enter said combustion chamber thereby to enable combustion of said fuel to occur, the amount of said other portion being such that the air-fuel ratio in said combustion chamber is allowed to approach stoichiometric conditions.
Claim 16
Dependent Claim
42 words
The apparatus according to claim 13 wherein said (d) (1) means causes said portion of said air to flow in a first direction and then to flow in the opposite direction before reversing direction once again and flowing along said exhaust duct.
Claim 17
Dependent Claim
27 words
The heating apparatus according to claim 13 wherein said exhaust duct has an entrance connected to the inner one of said parallel walls of said combustion chamber.
Claim 18
Dependent Claim
28 words
The heating apparatus according to claim 13 wherein said (d) means includes an electrically driven fan that causes both of said portions of air to enter said apparatus.
Claim 19
Dependent Claim
23 words
The apparatus according to claim 13 wherein said (d) means includes a fan powered by the exhaust gases produced within said combustion chamber.
Claim 20
Dependent Claim
16 words
The apparatus according to claim 17 wherein said fan also moves air toward said combustion chamber.
Claim 21
Dependent Claim
35 words
The apparatus according to claim 13 wherein said (d) (1) means includes a fan and wherein said (d) (2) means includes a compressor wheel which pumps air propelled by said fan into said combustion chamber.
Claim 22
Dependent Claim
51 words
The apparatus according to claim 1 wherein said combustion chamber is effectively divided into two parallel communicating parts and wherein the air pumped in by said compressor wheel travels through one of said parts in one direction and then reverses field and travels through the other part in the opposite direction.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-11 | 1980-07-12 | 1981-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-11 | 1984-07-12 | 1985-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-11 | 1988-07-12 | 1989-01-11 | $7700.00 | Window Closed / Lapsed |