US4081737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Secondary battery charger and heater
Assignee: Individual
•
Filing: 1976-05-28
•
Granted: 1978-03-28
•
Expires: 1996-05-28
Abstract
Abstract A plate of magnetic material is provided in close proximity to a flat transformer in a manner to effectively generate heat due to eddy currents induced in the plate by leakage magnetic flux from the flat transformer, whereby a charger, including the transformer and the plate, can charge a battery while also warming the same.
Inventors
- 👤 Hiroyasu Miyahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:58
CPC Classifications
H; H02; H02J; H02J7/00; H02J7/70; H01; H01M; H01M10/00; H01M10/42; H01M10/46; H01M10/60; H01M10/61; H01M10/615; H01M10/62; H01M10/625; H01M10/65; H01M10/657; H02J4/00; H02J4/20; H02J4/25; H02J7/02; H01M10/655; H01M10/6554; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y10; Y10S; Y10S320/00; Y10S320/28
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
A secondary battery charger including first terminals connectable to a suitable alternating power source and second terminals connectable to a secondary battery, which charger comprises: a rectifier connected to one of said second terminals; a transformer having a primary coil connected to said first terminals and having a second coil connected to said rectifier; and heating means located in thermal contact with the battery, said heating means comprising a magnetic plate provided in close proximity of said transformer in a manner to effectively generate heat due to eddy currents induced in the plate by leakage magnetic flux from said transformer.
Claim 2
Dependent Claim
100 words
A secondary battery charger including first terminals connectable to a suitable alternating power source and second terminals connectable to a secondary battery, which charger comprises: a rectifier connected to one of said second terminals; a transformer having a primary coil connected to said first terminals and having a second coil connected to said rectifier; and heating means located in thermal contact with the battery, said heating means comprising a magnetic plate provided in close proximity of said transformer in a manner to effectively generate heat due to eddy currents induced in the plate by leakage magnetic flux from said transformer.
Claim 3
Dependent Claim
22 words
A secondary battery charger according to claim 1, further comprising a cover which ensures that said secondary battery charger is liquid tight.
Claim 4
Dependent Claim
16 words
A secondary battery charger according to claim 2, in which said cover is made of plastics.
Claim 5
Dependent Claim
17 words
A secondary battery charger according to claim 2, in which said cover is made of acid-proof material.
Claim 6
Dependent Claim
20 words
A secondary battery charger according to claim 2, further comprising a frame secured to one major surface of said cover.
Claim 7
Dependent Claim
15 words
A secondary battery charger according to claim 5, in which said holder frame is L-shaped.
Claim 8
Dependent Claim
34 words
A secondary battery charger according to claim 1, in which said rectifier is secured to said magnetic plate in order to dissipate its energy loss in the form of heat in said magnetic plate.
References Cited (Backward Citations)
US2626971A
Cited
DE1563895A1
Cited
US3654426A
Cited
US3675108A
Cited
US3938018A
Cited
US3991356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-03-27 | 1981-09-26 | 1982-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-03-27 | 1985-09-26 | 1986-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-03-27 | 1989-09-26 | 1990-03-28 | $7700.00 | Window Closed / Lapsed |