US3894526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater construction particularly for mobile installations
Assignee: Eberspaecher Climate Control Systems GmbH and Co KG
•
Filing: 1974-02-07
•
Granted: 1975-07-15
•
Expires: 1994-02-07
Abstract
Abstract A space heater, particularly of the mobile type for motor vehicles, boats, campers, etc., comprises a tubular support part which provides a support for a drive motor which is arranged centrally therein and which includes a fan at one end for directing combustion air inwardly into the tubular support and into a combustion chamber and also for directing space heating air around the tubular support and around the combustion chamber. A single integral part which is advantageously die cast or molded forms the combustion chamber, a precombustion chamber with a fuel inlet connection and a heat exchanger section with a lateral exhaust discharge. The single part is located within the casing and it includes inwardly extending rib portions of the heat exchanger over which the combustion air passes on the way to the discharge for the combustion air which is located at one end of the outer casing. The drive motor also drives a combustion air fan which is at its end which is opposite to the inlet end and adjacent the inner end of the combustion chamber. A fuel is admitted through the fuel inlet connection to the precombustion chamber which includes means for igniting the fuel, and the combustion chamber includes a perforated flame tube which discharges against the closed end of the heat exchanger so that the combustion gases flow backwardly to a lateral discharge connected to the exhaust pipe.
Inventors
- 👤 Siegfried Kofink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:25
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2212; F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
352 words
A space heater, particularly of the mobile type for motor vehicles, boats, campers, etc., comprising a tubular support part, a drive motor carried by and located in said tubular support part having a rotatable inlet fan for the inflow of space air to be heated around said tubular support part, said tubular support part surrounding most of the length of said motor and spaced radially outwardly therefrom to define an air flow space therebetween and terminating in an inner flanged end, an outer casing surrounding said tubular support part and spaced outwardly therefrom defining an air inlet at one end and extending beyond said support part at its opposite end and terminating at the opposite end in a space heating air discharge, a hollow tubular single integral part having a mounting flange bolted to and axially aligned with said tubular support part flanged end and defining a lateral antechamber having a fuel feed connection with igniter means for igniting the fuel and also defining a central combustion chamber section and an inner and outer ribbed heat exchanger section with a closed outer end and being located within and spaced from said casing and having an exhaust pipe connection spaced inwardly from the enclosed end for exhausting the gases generated in said combustion chamber, said tubular support part having a combustion air inlet to said combustion chamber, the space between said outer casing and said support part, said combustion chamber and said heat exchanger section, defining a flow space for space heating air flow from said space heating inlet to said space heating air outlet, at least one thermostable insert having a radially extending flange connected between said flange end of said support part and said mounting flange of said single integral part and forming an outer guide wall for the combustion air and flame guide means extending from said combustion chamber toward the closed end of said integral part but being spaced axially from said closed end and inwardly from said heat exchanger section to permit exit of the combustion gases therefrom and flow thereof in contact with said heat exchanger section.
Claim 2
Dependent Claim
352 words
A space heater, particularly of the mobile type for motor vehicles, boats, campers, etc., comprising a tubular support part, a drive motor carried by and located in said tubular support part having a rotatable inlet fan for the inflow of space air to be heated around said tubular support part, said tubular support part surrounding most of the length of said motor and spaced radially outwardly therefrom to define an air flow space therebetween and terminating in an inner flanged end, an outer casing surrounding said tubular support part and spaced outwardly therefrom defining an air inlet at one end and extending beyond said support part at its opposite end and terminating at the opposite end in a space heating air discharge, a hollow tubular single integral part having a mounting flange bolted to and axially aligned with said tubular support part flanged end and defining a lateral antechamber having a fuel feed connection with igniter means for igniting the fuel and also defining a central combustion chamber section and an inner and outer ribbed heat exchanger section with a closed outer end and being located within and spaced from said casing and having an exhaust pipe connection spaced inwardly from the enclosed end for exhausting the gases generated in said combustion chamber, said tubular support part having a combustion air inlet to said combustion chamber, the space between said outer casing and said support part, said combustion chamber and said heat exchanger section, defining a flow space for space heating air flow from said space heating inlet to said space heating air outlet, at least one thermostable insert having a radially extending flange connected between said flange end of said support part and said mounting flange of said single integral part and forming an outer guide wall for the combustion air and flame guide means extending from said combustion chamber toward the closed end of said integral part but being spaced axially from said closed end and inwardly from said heat exchanger section to permit exit of the combustion gases therefrom and flow thereof in contact with said heat exchanger section.
Claim 3
Dependent Claim
353 words
A space heater, particularly of the mobile type for motor vehicles, boats, campers, etc., comprising a tubular support part, a drive motor in said support part having a rotatable inlet fan for the inflow of space air to be heated around said support part, said tubular support part supporting most of the length of said motor and spaced radially outwardly therefrom to define an air flow space therebetween and terminating in an inner flanged end, an outer casing surrounding said tubular support part and spaced outwardly therefrom defining an air inlet at one end and extending beyond said support part at its opposite end and terminating at the opposite end in a space heating air discharge, a single integral part having a mounting flange bolted to said tubular support part flanged end and defining an antechamber having a fuel feed connection with igniter means for igniting the fuel and also defining a combustion chamber section and an inner and outer ribbed heat exchanger section located within and spaced from said casing and having an exhaust pipe connection for exhausting the gases generated in said combustion chamber, said tubular support having a combustion air inlet to said combustion chamber, the space between said outer casing and said support part, said combustion chamber and said heat exchanger section, defining a flow space for space heating air flow from said space heating inlet to said space heating air outlet, said drive motor including said rotatable inlet fan at one end for the inflow of space air to said space air inlet and a combustion air fan at its opposite end for the inflow of combustion air having a centrally arranged guide wall, and an annular thermostablE insert having a radially extending flange disposed between said flanged end of said support part and said mounting flange of said integral part and extending into said combustion chamber and being adjacent said combustion air fan in spaced relation to said guide wall and extending inwardly from said single integral part and defining a flow passage with said guide wall for the flow of combustion air into the combustion chamber.
Claim 4
Dependent Claim
353 words
A space heater, particularly of the mobile type for motor vehicles, boats, campers, etc., comprising a tubular support part, a drive motor in said support part having a rotatable inlet fan for the inflow of space air to be heated around said support part, said tubular support part supporting most of the length of said motor and spaced radially outwardly therefrom to define an air flow space therebetween and terminating in an inner flanged end, an outer casing surrounding said tubular support part and spaced outwardly therefrom defining an air inlet at one end and extending beyond said support part at its opposite end and terminating at the opposite end in a space heating air discharge, a single integral part having a mounting flange bolted to said tubular support part flanged end and defining an antechamber having a fuel feed connection with igniter means for igniting the fuel and also defining a combustion chamber section and an inner and outer ribbed heat exchanger section located within and spaced from said casing and having an exhaust pipe connection for exhausting the gases generated in said combustion chamber, said tubular support having a combustion air inlet to said combustion chamber, the space between said outer casing and said support part, said combustion chamber and said heat exchanger section, defining a flow space for space heating air flow from said space heating inlet to said space heating air outlet, said drive motor including said rotatable inlet fan at one end for the inflow of space air to said space air inlet and a combustion air fan at its opposite end for the inflow of combustion air having a centrally arranged guide wall, and an annular thermostablE insert having a radially extending flange disposed between said flanged end of said support part and said mounting flange of said integral part and extending into said combustion chamber and being adjacent said combustion air fan in spaced relation to said guide wall and extending inwardly from said single integral part and defining a flow passage with said guide wall for the flow of combustion air into the combustion chamber.
Claim 5
Dependent Claim
20 words
A space heater, according to claim 2, wherein said single integral part comprises a die cast or injection molded part.
Claim 6
Dependent Claim
28 words
A space heater, according to claim 2, wherein said fuel feed pipe connection is formed integrally with said single integral part which comprises a single die cast part.
Claim 7
Dependent Claim
25 words
A space heater, according to claim 2, wherein said insert is thermostable and is arranged at the higher temperature stress points of said integral part.
Claim 8
Dependent Claim
16 words
A space heater, according to claim 5, wherein said insert is cast into said integral part.
Claim 9
Dependent Claim
50 words
A space heater, according to claim 5, wherein there are two concentrically arranged inserts adjacent said combustion air fan forming a ring passage for combustion air and being connected to said single integral part adjacent the end thereof connected to said tubular support part, said inserts comprising heat proof plates.
Claim 10
Dependent Claim
30 words
A space heater, according to claim 2, wherein said outer casing comprises a plastic jacket secured to said integral part and spaced from the outer wall of said integral part.
Claim 11
Dependent Claim
45 words
A space heater, according to claim 8, wherein said jacket is formed of two half-shell portions and an end cap surrounding each half-shell portion at each end and defining a space air inlet at one end and a space air outlet at the opposite end.
Claim 12
Dependent Claim
28 words
A space heater, according to claim 9, wherein said end caps are of identical configuration and engage over the periphery of said shell portions forming said outer casing.
Claim 13
Dependent Claim
17 words
A space heater, according to claim 2, wherein said antechamber extends laterally outwardly from said combustion chamber.
Claim 14
Dependent Claim
24 words
A spacer heater, according to claim 2, wherein said exhaust pipe connection includes a laterally extending pipe formed integrally with said single integral part.
Claim 15
Dependent Claim
61 words
A space heater, according to claim 2, wherein said heat exchanger part comprises an axial extension of said combustion chamber and it includes separate indirect heating surfaces on the interior and separate indirect heat exchanger surfaces on the exterior, said exhaust pipe extending laterally and piercing through the outer indirect heating surfaces in a direction extending inwardly toward said combustion chamber.
References Cited (Backward Citations)
US2619082A
Cited
US2787319A
Cited
US2779398A
Cited
US3046973A
Cited
US3103923A
Cited
US3144862A
Cited
US3779229A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |