US5354971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual push-pull heating device of induction cooker having multiple burners
Assignee: Individual
•
Filing: 1992-07-15
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Granted: 1994-10-11
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Expires: 2012-07-15
Abstract
Abstract A dual push-pull heating device of induction cooker having multiple burners is provided with a microprocessor controlling a logic amplifying drive circuit outputting a high-frequency pulse signal, so as to drive alternately at least a power element or power transistor having two parallel electromagnetic induction coils arranged at an end thereof in such a manner that a common end of said induction coils is connected with a common connection point of a relay whose normal close point is connected with a non-common end of one of the induction coils and whose normal open point is connected with a non-common end of another one of the induction coils.
Inventors
- 👤 Su-Min Chen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:54
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/02; H05B6/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
110 words
A dual push-pull heating device of an induction cooker having multiple burners comprising logic amplifying drive circuitry; a power element connected to receive high frequency signals from said logic amplifying drive circuitry; at least two induction coils connected in parallel; a relay connected to said induction coils, and having a common connection point connected to commonly connected ends of said induction coils, and a normally closed position of said relay with said common connection point connected to a non-common end of one of said induction coils, and a normally open position of said relay with said common connection point connected to a non-common end of another of said induction coils.
Claim 2
Dependent Claim
110 words
A dual push-pull heating device of an induction cooker having multiple burners comprising logic amplifying drive circuitry; a power element connected to receive high frequency signals from said logic amplifying drive circuitry; at least two induction coils connected in parallel; a relay connected to said induction coils, and having a common connection point connected to commonly connected ends of said induction coils, and a normally closed position of said relay with said common connection point connected to a non-common end of one of said induction coils, and a normally open position of said relay with said common connection point connected to a non-common end of another of said induction coils.
Claim 3
Dependent Claim
67 words
The dual push-pull heating device of an induction cooker having multiple burners of claim 1 wherein said power element includes two interconnected power transistors having a common connecting point between hem and connected to said induction coils at said common connecting point of said transistors, said two power transistors being driven alternately by said logic amplifying drive circuitry for alternating driving power through a said induction coil.
Claim 4
Dependent Claim
26 words
The dual push-pull heating device of an induction cooker having multiple burners of claim 1 wherein said induction coils have dissimilar coil turns and coil diameters.
Claim 5
Dependent Claim
32 words
The dual push-pull heating device of an induction cooker having multiple burners of claim 1 further comprising a microcomputer connected to send a control signal to regulate said logic amplifying drive circuitry.
Claim 6
Dependent Claim
39 words
The dual push-pull heating device of an induction cooker having multiple burners of claim 4 wherein said control signal of said microcomputer is delayed for a predetermined period of time in relation to a switching action of said relay.
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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |