Patent US3877720A successfully refreshed from Google Patents.
US3877720A
Expired / Lapsed
US
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Air-bag system
Assignee: Volkswagen AG
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Filing: 1972-11-27
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Granted: 1975-04-15
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Expires: 1992-11-27
Abstract
Abstract A sensor activated air bag safety device including an AND gate arrangement which determines whether or not the safety device was activated as a result of an accident. The AND gate arrangement includes a means for recording the determination.
Inventors
- 👤 Horst Gradahrend Gent Upmeier
- 👤 Ulrich Seiffert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 07:05
CPC Classifications
B; B60; B60R; B60R21/00; B60R21/01; B60R21/017; B60R21/0173
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
105 words
Air bag safety apparatus, comprising, in combination: a. gas delivery means for expanding an air bag; b. sensor means connected to the gas delivery means for activating said gas delivery means to expand the bag in response to a sensed condition; and c. logic means connected with said sensor means and said gas delivery means for providing one output indication in the event that inflation of the air bag is the result of an activation by said sensor means and for providing another output indication in the event that inflation of the air bag is not the result of an activation by said sensor means.
Claim 2
Dependent Claim
105 words
Air bag safety apparatus, comprising, in combination: a. gas delivery means for expanding an air bag; b. sensor means connected to the gas delivery means for activating said gas delivery means to expand the bag in response to a sensed condition; and c. logic means connected with said sensor means and said gas delivery means for providing one output indication in the event that inflation of the air bag is the result of an activation by said sensor means and for providing another output indication in the event that inflation of the air bag is not the result of an activation by said sensor means.
Claim 3
Dependent Claim
21 words
The apparatus defined in claim 1, wherein said logic means has an output connection connected with means for recording the output.
Claim 4
Dependent Claim
34 words
The apparatus defined in claim 2 wherein the recording means is a fuse which is rated below the output amperage of said logic means thereby being burned out upon output from said logic means.
Claim 5
Dependent Claim
61 words
The apparatus defined in claim 1, wherein a pressure measuring device is connected with said gas delivery means for detection of changes in pressure resulting from air bag inflation, said pressure measuring device having an output connection to said logic means, said changes in pressure causing said pressure measuring device to deliver an output pulse for use by said logic means.
Claim 6
Dependent Claim
87 words
The apparatus defined in claim 4, wherein said logic means has two, input connections, one input connection being connected with an output connection of said sensor means while the other logic means input connection is connected with the output connection of said pressure measuring device whereby said logic means will provide an electrical output pulse as said first output indication only as a result of simultaneous input pulses to both input connections of said logic means, said second output indication being the absence of an output pulse.
Claim 7
Dependent Claim
21 words
The apparatus defined in claim 4, wherein said logic means is comprised of a logic circuit which contains an AND gate.
Claim 8
Dependent Claim
35 words
The apparatus defined in claim 6, wherein said logic circuit includes a pulse shaper connected between said pressure measuring device and said AND gate so as to provide a suitable output to said AND gate.
Claim 9
Dependent Claim
17 words
The apparatus defined in claim 1, wherein said gas delivery means includes a bottle of compressed air.
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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) | 1978-04-14 | 1978-10-14 | 1979-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-14 | 1982-10-14 | 1983-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-14 | 1986-10-14 | 1987-04-15 | $7700.00 | Window Closed / Lapsed |