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US4498359A
Expired / Lapsed
US
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System for detecting ranges in an automatic transmission for vehicles
Assignee: Subaru Corp
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Filing: 1981-11-24
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Granted: 1985-02-12
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Expires: 2001-11-24
Abstract
Abstract A system for detecting the neutral range state of an automatic transmission for an engine powered vehicle having a select lever for changing ranges of the automatic transmission. The automatic transmission has a starting circuit comprising a battery, a starter switch, an inhibitor switch, and a starter which are connected in series. The inhibitor switch is turned on when the select lever of the automatic transmission is in a neutral position. The system further has a circuit responsive to voltages at both ends of the inhibitor switch for producing an output when the inhibitor switch is closed, whereby the closing of the inhibitor switch is detected.
Inventors
- 👤 Kazuo Hara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:35
CPC Classifications
F; F16; F16H; F16H59/00; F16H59/68; F16H59/70; F02; F02N; F02N11/00; F02N11/10; F02N11/101; F02N11/103; F16H59/02; F16H59/08; F16H59/10; F16H59/105; F16H2059/6823
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
148 words
A system for detecting a neutral range state of an automatic transmission for an engine powered vehicle having a select lever for changing ranges of said automatic transmission, comprising a battery, a starter switch, an inhibitor switch, and a starter which are connected in series, said inhibitor switch being turned on when said select lever of said automatic transmission is in a neutral position; and a circuit means responsive to voltages at both ends of said inhibitor switch for producing an output when said inhibitor switch is closed, said circuit means comprising a pair of diodes connected to said both ends of said inhibitor switch at a cathode of each of said diodes, respectively, a voltage supply for applying a voltage to an anode of each said diode, and an exclusive OR gate connected to said anode of each said diode, whereby the neutral range state is detected.
Claim 2
Independent Claim
148 words
A system for detecting a neutral range state of an automatic transmission for an engine powered vehicle having a select lever for changing ranges of said automatic transmission, comprising a battery, a starter switch, an inhibitor switch, and a starter which are connected in series, said inhibitor switch being turned on when said select lever of said automatic transmission is in a neutral position; and a circuit means responsive to voltages at both ends of said inhibitor switch for producing an output when said inhibitor switch is closed, said circuit means comprising a pair of diodes connected to said both ends of said inhibitor switch at a cathode of each of said diodes, respectively, a voltage supply for applying a voltage to an anode of each said diode, and an exclusive OR gate connected to said anode of each said diode, whereby the neutral range state is detected.
Claim 3
Dependent Claim
22 words
The system according to claim 1, further comprising: zener diodes connected between ground and each input respectively of said exclusive OR gate.
Claim 4
Independent Claim
150 words
A system for detecting a neutral range state of an automatic transmission for an engine powered vehicle having a select lever for changing ranges of said automatic transmission, comprising a battery, a starter switch, an inhibitor switch, and a starter which are connected in series, said inhibitor switch being turned on when said select lever of said automatic transmission is in a neutral position; and a circuit means responsive to voltages at both ends of said inhibitor switch for producing an output when said inhibitor switch is closed, said circuit means comprising a pair of diodes connected to said both ends of said inhibitor switch at a cathode of each of said diodes, respectively, a voltage supply for applying a voltage to an anode of each said diode, and means comprising a logic gate connected to said anode of each said diode so as to detect the neutral range state.
Claim 5
Independent Claim
150 words
A system for detecting a neutral range state of an automatic transmission for an engine powered vehicle having a select lever for changing ranges of said automatic transmission, comprising a battery, a starter switch, an inhibitor switch, and a starter which are connected in series, said inhibitor switch being turned on when said select lever of said automatic transmission is in a neutral position; and a circuit means responsive to voltages at both ends of said inhibitor switch for producing an output when said inhibitor switch is closed, said circuit means comprising a pair of diodes connected to said both ends of said inhibitor switch at a cathode of each of said diodes, respectively, a voltage supply for applying a voltage to an anode of each said diode, and means comprising a logic gate connected to said anode of each said diode so as to detect the neutral range state.
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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |