US3683887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Timer controlled vehicle heater
Assignee: Individual
•
Filing: 1971-04-02
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Granted: 1972-08-15
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Expires: 1991-04-02
Abstract
Abstract Apparatus employing a container of compressed fuel such as propane for warming an automobile prior to the occupant''s use thereof, particularly on extremely cold days. This device employs a timer that is set to actuate the energization of a glow plug and air valve which allows the fuel to enter the heat exchanger in which the fuel is burned. The timer controls the device so that the glow plug and air valve are turned off after a predetermined time of operation. The timer may also be set to keep the heating cycle on until the occupant of the vehicle turns it off.
Inventors
- 👤 Emery J Sammut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:11
CPC Classifications
F; F23; F23N; F23N5/00; F23N5/20; F23N5/206; F23N2241/00; F23N2241/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
126 words
In a timer controlled vehicle heater for heating the inside of the vehicle prior to the occupant entering said vehicle, the combination comprising a supply of compressed fuel, a heat exchanger, a tube connecting said supply of compressed fuel to said heat exchanger, a valve in said tube controlling the flow of fuel therethrough, a glow plug in said heat exchanger, a timer controlling a cam device having two cam surfaces, an electric switch connected to said glow plug controlled by one of said cam surfaces, a source of current supply connected to said glow plug when said electric switch is closed by said one cam surface, and means controlled by the other of said cam surfaces for controlling said valve connected in said fuel line.
Claim 2
Dependent Claim
126 words
In a timer controlled vehicle heater for heating the inside of the vehicle prior to the occupant entering said vehicle, the combination comprising a supply of compressed fuel, a heat exchanger, a tube connecting said supply of compressed fuel to said heat exchanger, a valve in said tube controlling the flow of fuel therethrough, a glow plug in said heat exchanger, a timer controlling a cam device having two cam surfaces, an electric switch connected to said glow plug controlled by one of said cam surfaces, a source of current supply connected to said glow plug when said electric switch is closed by said one cam surface, and means controlled by the other of said cam surfaces for controlling said valve connected in said fuel line.
Claim 3
Dependent Claim
58 words
In a timer controlled vehicle heater for heating the inside of the vehicle prior to the occupant entering said vehicle, the combination as set forth in claim 1, further characterized in that said valve controlling means comprises a solenoid, a second electric switch controlled by said other cam surface connecting said solenoid to said source of current supply.
Claim 4
Dependent Claim
45 words
In a timer controlled vehicle heater for heating the inside of the vehicle prior to the occupant entering said vehicle, the combination as set forth in claim 1, further characterized in that said valve controlling means comprises a member slidably engaging said other cam surface.
References Cited (Backward Citations)
US2654422A
Cited
US3078838A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-15 | 1976-02-14 | 1976-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-15 | 1980-02-14 | 1980-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-15 | 1984-02-14 | 1984-08-15 | $7700.00 | Window Closed / Lapsed |