Patent US3989030A successfully refreshed from Google Patents.
US3989030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid fuel burning heater unit
Assignee: Webasto Werk W Baier GmbH and Co
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Filing: 1975-06-23
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Granted: 1976-11-02
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Expires: 1995-06-23
Abstract
Abstract A liquid fuel burning heater for use in vehicles comprising a burner unit enclosed within a burner housing which in turn is surrounded by the heater housing. A lateral head extending from the heater housing encloses within a hermetically sealed space the connecting end of the ignition plug, a duct leading from this head space either to the atmosphere outside the vehicle, or to the intake side of the burner unit, thereby evacuating leaked exhaust gases.
Inventors
- 👤 Reiner Friedl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:20
CPC Classifications
B; B60; B60H; B60H1/00; B60H1/22; B60H1/2203; B60H1/2212; F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/065; B60H2001/2268; B60H2001/2281
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
133 words
A liquid fuel burning heater, suitable for use in a vehicle, comprising in combination: a heater housing; a burner unit arranged inside the heater housing and including a burner head, a combustion air blower, means for feeding fuel to the burner head, and an ignition plug extending accessibly from outside the burner housing to the vicinity of the burner head; and a combustion chamber arranged inside the heater housing and located adjacent to the burner head, a heat exchanger being associated with the combustion chamber, for the transfer of combustion heat to a heat carrier medium flowing through the heat exchanger; and wherein the ignition plug has an accessible outer extremity which is hermetically enclosed within a head space defined by lateral head walls of the heater housing and by a removable cover.
Claim 2
Dependent Claim
133 words
A liquid fuel burning heater, suitable for use in a vehicle, comprising in combination: a heater housing; a burner unit arranged inside the heater housing and including a burner head, a combustion air blower, means for feeding fuel to the burner head, and an ignition plug extending accessibly from outside the burner housing to the vicinity of the burner head; and a combustion chamber arranged inside the heater housing and located adjacent to the burner head, a heat exchanger being associated with the combustion chamber, for the transfer of combustion heat to a heat carrier medium flowing through the heat exchanger; and wherein the ignition plug has an accessible outer extremity which is hermetically enclosed within a head space defined by lateral head walls of the heater housing and by a removable cover.
Claim 3
Dependent Claim
34 words
A heater as defined in claim 1, further comprising a duct leading from the head space of the burner housing to the open atmosphere, a distance away from the location of the heater unit.
Claim 4
Dependent Claim
34 words
A heater as defined in claim 1, further comprising a connecting duct extending from the head space of the burner housing to the intake side of the combustion air blower of the burner unit.
Claim 5
Dependent Claim
61 words
A heater as defined in claim 3, wherein the burner unit is enclosed within a burner housing, said housing, in turn, being surrounded by the heater housing, with a substantially annular air flow gap between the two housings; and the connecting duct extends from the burner housing, as an integral part thereof, across said annular gap and into the head space.
Claim 6
Dependent Claim
35 words
A heater as defined in claim 4, wherein the connecting duct is surrounded by a flexible sealing gasket, seated in an aperture of the heater housing through which the duct extends into the head space.
Claim 7
Dependent Claim
23 words
A heater as defined in claim 1, further comprising heater controls which are likewise enclosed within said head space of the heater housing.
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) | 1979-11-02 | 1980-05-03 | 1980-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-02 | 1984-05-03 | 1984-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-02 | 1988-05-03 | 1988-11-02 | $7700.00 | Window Closed / Lapsed |