US3784841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric power supply system
Assignee: Nissan Motor Co Ltd
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Filing: 1972-11-28
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Granted: 1974-01-08
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Expires: 1992-11-28
Abstract
Abstract An electric power supply system having a capacitor as an auxiliary power source in addition to a DC battery as a main power source. In this power supply system, the capacitor is charged only through a resistor by a source voltage of the DC battery to a voltage approximately equal to the source voltage. The resistor has a value of resistance considerably higher than that of a load to be connected with the power supply system. The DC battery is grounded at its positive or negative terminal. The power supply system is adapted for energizing an actuator of a safety device for a motor vehicle.
Inventors
- 👤 A Hosaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:31
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/01; B60R21/017; H; H02; H02J; H02J9/00; H02J9/04; H02J9/06
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
216 words
An electric power supply system for energizing a load such as an actuator of a safety device of a motor vehicle comprising: a main DC power source comprising a battery; a first diode having one terminal connected to one terminal of said bettery so as to permit a current to flow through said battery in only one direction from the positive to negative terminals of said battery; a series circuit bypassing said first diode, said series circuit formed by a resistor having one terminal connected to said one terminal of said battery and a second diode having one terminal connected to the other terminal of said resistor; two output terminals, one connected to the other terminal of said battery and the other output terminal to the other terminals of said first and second diodes, and with the actuator load connected between said two output terminals; and an auxiliary power source comprising a capacitor having one terminal connected to the other terminal of said battery and the other terminal to a junction between said resistor and said second diode, whereby said capacitor is charged by the source voltage of said battery through said resistor to a voltage approximately equal to said battery, and a discharge current from said capacitor flows through said second diode to said actuator.
Claim 2
Dependent Claim
216 words
An electric power supply system for energizing a load such as an actuator of a safety device of a motor vehicle comprising: a main DC power source comprising a battery; a first diode having one terminal connected to one terminal of said bettery so as to permit a current to flow through said battery in only one direction from the positive to negative terminals of said battery; a series circuit bypassing said first diode, said series circuit formed by a resistor having one terminal connected to said one terminal of said battery and a second diode having one terminal connected to the other terminal of said resistor; two output terminals, one connected to the other terminal of said battery and the other output terminal to the other terminals of said first and second diodes, and with the actuator load connected between said two output terminals; and an auxiliary power source comprising a capacitor having one terminal connected to the other terminal of said battery and the other terminal to a junction between said resistor and said second diode, whereby said capacitor is charged by the source voltage of said battery through said resistor to a voltage approximately equal to said battery, and a discharge current from said capacitor flows through said second diode to said actuator.
Claim 3
Dependent Claim
20 words
An electric power supply system as claimed in claim 1, in which said battery is grounded at its negative terminal.
Claim 4
Dependent Claim
20 words
An electric power supply system as claimed in claim 1, in which said battery is grounded at its positive terminal.
Claim 5
Dependent Claim
25 words
An electric power supply system as claimed in claim 1, in which said resistor has a value of resistance higher than that of said load.
References Cited (Backward Citations)
US3262018A
Cited
US3571659A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |