US3794242A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trailer heating system
Assignee: Electrolux AB
•
Filing: 1972-08-16
•
Granted: 1974-02-26
•
Expires: 1992-08-16
Abstract
Abstract A central heating system for the enclosed space of a vehicle trailer, or motor home having circulating liquid medium which is heated in a boiler and heat transferred to radiators in an open system via an expansion vessel. The expansion vessel is situated at a high level and is so constructed that vapor in the riser conduit of the system is condensed and substantially only liquid descends in the downward conduit from the expansion vessel; the heating of the enclosed space is controlled by a thermostat operatively connected to the system.
Inventors
- 👤 M Hagdorn
- 👤 T Palmeth
- 👤 J Boivie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:47
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2209; B60H1/00357; B60H1/00364; F; F24; F24D; F24D3/00; F24D3/10; F24D3/1008
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
144 words
A central heating arrangement of a room forming an enclosed space having a limited height difference between floor and ceiling in an open system having a circulating liquid and radiators comprising: a. a boiler for the liquid, b. means for heating the boiler, c. an expansion vessel, d. a riser pipe connecting the boiler to the expansion vessel, e. a down pipe connecting the expansion vessel to the radiators, f. the expansion vessel being so constructed and arranged that the vapor ascending together with the liquid in the riser pipe is condensed and passes through the down pipe with its heat content being supplied to the radiators with the liquid, and g. said boiler, radiators, and expansion vessel all being located within said enclosed space and h. means providing heat communication over the expansion vessel and boiler by air flow thereover to said room.
Claim 2
Dependent Claim
144 words
A central heating arrangement of a room forming an enclosed space having a limited height difference between floor and ceiling in an open system having a circulating liquid and radiators comprising: a. a boiler for the liquid, b. means for heating the boiler, c. an expansion vessel, d. a riser pipe connecting the boiler to the expansion vessel, e. a down pipe connecting the expansion vessel to the radiators, f. the expansion vessel being so constructed and arranged that the vapor ascending together with the liquid in the riser pipe is condensed and passes through the down pipe with its heat content being supplied to the radiators with the liquid, and g. said boiler, radiators, and expansion vessel all being located within said enclosed space and h. means providing heat communication over the expansion vessel and boiler by air flow thereover to said room.
Claim 3
Dependent Claim
31 words
The arrangement in accordance with claim 1 wherein the expansion vessel has part thereof in the form of a vapor separator and another part thereof in the form of a condenser.
Claim 4
Dependent Claim
35 words
The arrangement in accordance with claim 1 further comprising a flue for the heating means, a jacket surrounding a portion of the flue and forming the boiler and additionally constituting part of the riser pipe.
Claim 5
Dependent Claim
31 words
The arrangement in accordance with claim 3 wherein the height of the boiler forming part of the riser pipe is approximately tHe same height as the remainder of the riser pipe.
Claim 6
Dependent Claim
57 words
The arrangement in accordance with claim 3 further comprising a housing for the burner, the flue being connected at the intake end to the housing, and an air intake conduit opening at one end to the exterior of the enclosed space and connected at the other end to the housing for supplying combustion air to the burner.
Claim 7
Dependent Claim
21 words
The arrangement in accordance with claim 3 wherein the riser pipe is supplied with heat over at least half its height.
Claim 8
Dependent Claim
47 words
The arrangement in accordance with claim 3 wherein the portion of the flue surrounded by the jacket has an upper part provided with an exterior surface which is roughened thereby causing vapor bubbles to be emitted from the upper part of the flue portion within the jacket.
Claim 9
Dependent Claim
13 words
The arrangement in accordance with claim 7 wherein the roughened surface is knurled.
Claim 10
Dependent Claim
39 words
The arrangement in accordance with claim 3 wherein an opening is provided in the floor of the enclosed space through which cool ambient air passes and flows over the boiler, flue, and the expansion vessel and thus becomes heated.
Claim 11
Dependent Claim
18 words
The arrangement in accordance with claim 1 wherein a non-return valve is arranged in the liquid circulation system.
Claim 12
Dependent Claim
23 words
The arrangement in accordance with claim 10 wherein the non-return valve is mounted inside the liquid container in connection to the riser pipe.
Claim 13
Dependent Claim
145 words
A central heating arrangement located between the floor and the ceiling of an enclosed space having a liquid heated in a boiler operated by a burner and circulated in radiators in an open system comprising: a. an expansion vessel, b. a riser pipe connecting the boiler to the expansion vessel, c. a down pipe connecting the expansion vessel to the radiators, d. the expansion vessel having one part which is a vapor separator and liquid container and another part which is an air cooled condenser whereby vapor ascending together with the liquid in the riser pipe is condensed and its heat content supplied to the radiators after passing through the down pipe, and e. said radiators being positioned at or above the level of said burner, and f. means providing heat communication over the expansion vessel and boiler by air flow thereover to said room.
Claim 14
Dependent Claim
145 words
A central heating arrangement located between the floor and the ceiling of an enclosed space having a liquid heated in a boiler operated by a burner and circulated in radiators in an open system comprising: a. an expansion vessel, b. a riser pipe connecting the boiler to the expansion vessel, c. a down pipe connecting the expansion vessel to the radiators, d. the expansion vessel having one part which is a vapor separator and liquid container and another part which is an air cooled condenser whereby vapor ascending together with the liquid in the riser pipe is condensed and its heat content supplied to the radiators after passing through the down pipe, and e. said radiators being positioned at or above the level of said burner, and f. means providing heat communication over the expansion vessel and boiler by air flow thereover to said room.
Claim 15
Dependent Claim
19 words
The arrangement in accordance with claim 12 wherein the radiators are located at a lower level than the boiler.
Claim 16
Dependent Claim
26 words
The arrangement in accordance with claim 12 wherein the air cooled condenser is a metal sleeve having an inner part and being provided with a cover.
Claim 17
Dependent Claim
19 words
The arrangement in accordance with claim 14 further comprising a yieldable element connecting the inner part and the cover.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |