US4384734A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Passenger protection apparatus
Assignee: Denso Corp
•
Filing: 1981-03-12
•
Granted: 1983-05-24
•
Expires: 2001-03-12
Abstract
Abstract A passenger protection system comprises an air bag operating circuit having a G sensor and a squib, and a back-up circuit connected in parallel to the operating circuit. A terminal of the parallel circuit including the air bag operating circuit and the back-up circuit is connected to the body earth through a battery mounted in the automobile, and the other terminal thereof is grounded through a diode, thus making it possible to supply power to squib for expansion of the air bag even if the G sensor is short-circuited on the occasion of an automobile collision.
Inventors
- 👤 Toshio Yasui
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:00
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/01; B60R21/017
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
151 words
A passenger protection system for use in an automobile having a key switch and a battery including two terminals one of which is connected to a body earth comprising: a detector switch, a responsive element connected in series with said detection switch, a capacitor and a first diode, said detection switch and said responsive element making up an operating circuit, said capacitor and said first diode making up a back-up circuit, said operating circuit and said back-up circuit making up a closed loop circuit, the junction point of said operating circuit and said capacitor being connectable to the other of said battery terminals through said key switch, a second diode for connecting the junction point of said operating circuit and said first diode to a body earth, wherein said back-up circuit includes a negative voltage generator circuit connected in parallel to said capacitor for applying a voltage pulse to said capacitor.
Claim 2
Dependent Claim
151 words
A passenger protection system for use in an automobile having a key switch and a battery including two terminals one of which is connected to a body earth comprising: a detector switch, a responsive element connected in series with said detection switch, a capacitor and a first diode, said detection switch and said responsive element making up an operating circuit, said capacitor and said first diode making up a back-up circuit, said operating circuit and said back-up circuit making up a closed loop circuit, the junction point of said operating circuit and said capacitor being connectable to the other of said battery terminals through said key switch, a second diode for connecting the junction point of said operating circuit and said first diode to a body earth, wherein said back-up circuit includes a negative voltage generator circuit connected in parallel to said capacitor for applying a voltage pulse to said capacitor.
Claim 3
Dependent Claim
138 words
A passenger protection system including an air bag operating circuit having a collision sensor for detecting the acceleration of the automobile body at the time of collision connected in series with a squib for expanding the air bag, and a back-up circuit having a back-up capacitor and a first diode connected in series with said back-up capacitor, said back-up circuit being connected in parallel to said operating circuit, said passenger protection system comprising means for connecting the junction point of said operating circuit and said back-up capacitor to an automobile-carried battery through an ignition switch, a second diode inserted between the junction point of said operating circuit and said first diode and the automobile body earth, and a negative voltage generator circuit connected in parallel to said back-up capacitor for applying a high voltage pulse to said capacitor.
Claim 4
Dependent Claim
138 words
A passenger protection system including an air bag operating circuit having a collision sensor for detecting the acceleration of the automobile body at the time of collision connected in series with a squib for expanding the air bag, and a back-up circuit having a back-up capacitor and a first diode connected in series with said back-up capacitor, said back-up circuit being connected in parallel to said operating circuit, said passenger protection system comprising means for connecting the junction point of said operating circuit and said back-up capacitor to an automobile-carried battery through an ignition switch, a second diode inserted between the junction point of said operating circuit and said first diode and the automobile body earth, and a negative voltage generator circuit connected in parallel to said back-up capacitor for applying a high voltage pulse to said capacitor.
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) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |