US4514645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power supply system for automotive parts having a rotary component
Assignee: Hitachi Ltd
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Filing: 1983-02-18
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Granted: 1985-04-30
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Expires: 2003-02-18
Abstract
Abstract A system for supplying power to automotive parts having a rotary component in which a pair of circular coils are disposed in opposition to each other around a rotary shaft of a rotor. One coil is fixed on rotor side, and the other coil is fixed on stator side, thereby forming a DC/DC converter. The rate of magnetic coupling between the coils is constant against the rotation of the coil on rotor side so that stable power is supplied efficiently to devices on rotor side in contactless fashion.
Inventors
- 👤 Akira Endo
- 👤 Akira Hasegawa
- 👤 Takanori Shibata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:33
CPC Classifications
B; B60; B60R; B60R16/00; B60R16/02; B60R16/023; B60R16/027; B60C; B60C23/00; B60C23/02; B60C23/04; B60C23/0408; B60C23/041; B60S; B60S1/00; B60S1/02; B60S1/04; B60S1/06; B60S1/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
194 words
A system for supplying electric power to automotive parts having a rotary component and a stationary component, the system comprising: a first coil fixed on the stationary component; a second coil fixed on the rotary component in opposition to said first coil; means for supplying an AC voltage to said first coil; means for rectifying the AC voltage induced in said second coil into a DC voltage; signal generating means connected to said means for rectifying; first spatial transmission means for transmitting a signal generated by said signal generating means from said rotary component to said stationary component, said first spatial transmission means being connected to said signal generating means; second spatial transmission means for receiving a signal transmitted by said first transmission means, said second spatial transmission means being fixed on said stationary component; and means for intensifying an excitation of said first coil for a predetermined length of time immediately following the generation of said signal and weakening said excitation for the remaining time, said means for intensifying being connected between said second spatial transmission means and said first coil, whereby said electric power is changed for said predetermined length of time.
Claim 2
Independent Claim
194 words
A system for supplying electric power to automotive parts having a rotary component and a stationary component, the system comprising: a first coil fixed on the stationary component; a second coil fixed on the rotary component in opposition to said first coil; means for supplying an AC voltage to said first coil; means for rectifying the AC voltage induced in said second coil into a DC voltage; signal generating means connected to said means for rectifying; first spatial transmission means for transmitting a signal generated by said signal generating means from said rotary component to said stationary component, said first spatial transmission means being connected to said signal generating means; second spatial transmission means for receiving a signal transmitted by said first transmission means, said second spatial transmission means being fixed on said stationary component; and means for intensifying an excitation of said first coil for a predetermined length of time immediately following the generation of said signal and weakening said excitation for the remaining time, said means for intensifying being connected between said second spatial transmission means and said first coil, whereby said electric power is changed for said predetermined length of time.
Claim 3
Dependent Claim
13 words
A system according to claim 1, wherein said signal is an optical signal.
Claim 4
Dependent Claim
13 words
A system according to claim 1, wherein said signal is an ultrasonic wave.
Claim 5
Dependent Claim
14 words
A system according to claim 1, wherein said signal is an electromagnetic induction signal.
Claim 6
Dependent Claim
16 words
A system according to claim 1, wherein said rotary component is a tire of an automobile.
Claim 7
Independent Claim
71 words
A system for supplying electric power between a rotary steering wheel used as an automotive part and a stationary component, the system comprising: a first coil fixed on the stationary component; a second coil fixed on the steering wheel in opposition to said first coil; means for supplying an AC voltage to said first coil; and means for rectifying the AC voltage induced in said second coil into a DC voltage.
Claim 8
Independent Claim
71 words
A system for supplying electric power between a rotary steering wheel used as an automotive part and a stationary component, the system comprising: a first coil fixed on the stationary component; a second coil fixed on the steering wheel in opposition to said first coil; means for supplying an AC voltage to said first coil; and means for rectifying the AC voltage induced in said second coil into a DC voltage.
Claim 9
Dependent Claim
73 words
A system according to claim 6, wherein said steering wheel includes signal generator means, said steering wheel and said stationary component include spatial transmission means for transmitting said signal from said steering wheel to said stationary component, and said stationary component includes means for intensifying an excitation of said first coil for a predetermined length of time immediately following the generation of said signal and a weakening said excitation for the remaining time.
Claim 10
Dependent Claim
13 words
A system according to claim 6, wherein said signal is an optical signal.
Claim 11
Dependent Claim
13 words
A system according to claim 6, wherein said signal is an ultrasonic wave.
Claim 12
Dependent Claim
14 words
A system according to claim 6, wherein said signal is an electromagnetic induction signal.
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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) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |