US4381438A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric control apparatus for controlling inductive heating
Assignee: EGO Elektro Geratebau GmbH
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Filing: 1981-06-03
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Granted: 1983-04-26
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Expires: 2001-06-03
Abstract
Abstract A cooker apparatus for heating a cooking pot inductively comprises an induction heating coil and a control device for controlling the heating power. The control device has a temperature-dependent guiding and control means and a sensor unit, adapted to be positioned on the cooking pot and subjected there to the evolution of steam in the cooking pot. The sensor unit is arranged to transmit control signals to the guiding and control means.
Inventors
- 👤 Gerhard Goessler
- 👤 Friedrich Koch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:17
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/06; H05B6/062; A; A47; A47J; A47J27/00; A47J27/56; A47J27/62; G; G05; G05D; G05D23/00; G05D23/19; G05D23/1902; G05D23/1905; G05D23/275; H05B2213/00; H05B2213/07; Y; Y10; Y10S; Y10S336/00; Y10S336/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
113 words
An electric control apparatus for controlling inductive heating of a cooking pot at least partly comprising an electrically conductive material, said apparatus comprising: an electric induction heating coil, for heating the pot by inducing an electric current thereof; a device for controlling the electrical power delivered to the induction heating coil, the control device having a temperature-dependent guiding and control means; and, a temperature sensing unit adapted to be so positioned on the cooking pot, over matter being heated therein, as to be there subjected to rising steam formed in the cooking pot by the matter being heated, the sensing unit having means for transmitting control signals to the guiding and control means.
Claim 2
Dependent Claim
113 words
An electric control apparatus for controlling inductive heating of a cooking pot at least partly comprising an electrically conductive material, said apparatus comprising: an electric induction heating coil, for heating the pot by inducing an electric current thereof; a device for controlling the electrical power delivered to the induction heating coil, the control device having a temperature-dependent guiding and control means; and, a temperature sensing unit adapted to be so positioned on the cooking pot, over matter being heated therein, as to be there subjected to rising steam formed in the cooking pot by the matter being heated, the sensing unit having means for transmitting control signals to the guiding and control means.
Claim 3
Dependent Claim
26 words
An apparatus according to claim 1, wherein the sensor unit is arranged to be triggered at a preset switching temperature below the boiling point of water.
Claim 4
Dependent Claim
35 words
An apparatus according to claim 1, wherein the sensor unit comprises a switch for switching the control device over from a high output at the start of a cooking operation to a lower subsequent output.
Claim 5
Dependent Claim
60 words
An apparatus according to claim 1, wherein the sensor unit comprises at least two switches which are mutually adjustable as to their operation temperature, the lower adjusted switch controlling a switch-over from a higher power output at the start of a cooking operation to a lower output for continued cooking and the higher adjusted switch controlling the continued cooking output.
Claim 6
Dependent Claim
38 words
An apparatus according to claim 1, wherein the sensor unit comprises a temperature-sensitive electrical sensor component by means of which control signals from the control device can be used to effect a power reduction dependent on sensor temperature.
Claim 7
Dependent Claim
13 words
An apparatus according to claim 5, wherein the temperature-sensitive component is a resistor.
Claim 8
Dependent Claim
24 words
An apparatus according to claim 1, wherein the sensor unit is adapted for connection to a selected one of a plurality of cooking points.
Claim 9
Dependent Claim
36 words
An apparatus according to claim 1, further comprising a switch, actuated by the control signals, for switching the control device from a high output at the start of a cooking operation to a lower subsequent output.
Claim 10
Dependent Claim
62 words
An apparatus according to claim 1, further comprising at least two switches, actuated by the control signals, which are mutually adjustable as to their operation temperature, the lower adjusted switch controlling a switch-over from a higher power output at the start of a cooking operation to a lower output for continued cooking and the higher adjustment switch controlling the continued cooking output.
Claim 11
Independent Claim
16 words
An apparatus according to claims 4 or 9, wherein the switches comprise pairs of switching contacts.
Claim 12
Dependent Claim
16 words
An apparatus according to claim 5, wherein the temperature-sensitive electrical sensor component is an electronic component.
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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) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |