US4684943A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unlocking device for a vehicle lid
Assignee: Soken Inc
•
Filing: 1986-01-27
•
Granted: 1987-08-04
•
Expires: 2006-01-27
Abstract
Abstract A device for unlocking a lid provided in a vehicle includes an unlocking actuator unit, a magnetic sensor unit, a signal processing unit, and a controller means. A transmitter unit with a power source generates and transmits a specific magnetic unlocking signal which is received by the magnetic sensor unit, hence, the unlocking actuator is controlled through the signal processing means and the controller means and, hence, the lid is unlocked.
Inventors
- 👤 Sotoo Kitamura
- 👤 Shigeyuki Akita
- 👤 Yoshiyuki Kago
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:32
CPC Classifications
G; G08; G08C; G08C17/00; G08C17/04; G07; G07C; G07C9/00; G07C9/00174; G07C9/00309; G07C2009/00753; G07C2009/00769; G07C2009/00777
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
206 words
A device for unlocking a lid provided in a vehicle comprising: unlockng actuator means for unlocking the lid by using an electric signal; means for generating a transmitted pulse signal having a plurality of groups of pulses; means for modulating a predetermined frequency signal with said transmitted pulse signal to produce a specific magnetic unlocking signal; means for transmitting said specific magnetic unlocking signal; magnetic sensor means for receiving said specific magnetic unlocking signal from the transmitting means, said magnetic sensor means including a magnetic core, an exciting coil wound on the magnetic core and a detection coil wound on the magnetic core; signal processing means, responsive to said sensor means, for generating a received pulse signal having a plurality of groups of pulses; controller means for receiving said received pulse signal from said signal processing means and generating a controller pulse signal when the number of pulses in any said group of pulses is within a predetermined range; and counter means for counting pulses in said controller pulse signal and generating said electric signal only when said counter means has counted in sequence a predetermined number of consecutive pulses indicative of an equivalent number of consecutive valid groups of pulses in said received pulse signal.
Claim 2
Independent Claim
206 words
A device for unlocking a lid provided in a vehicle comprising: unlockng actuator means for unlocking the lid by using an electric signal; means for generating a transmitted pulse signal having a plurality of groups of pulses; means for modulating a predetermined frequency signal with said transmitted pulse signal to produce a specific magnetic unlocking signal; means for transmitting said specific magnetic unlocking signal; magnetic sensor means for receiving said specific magnetic unlocking signal from the transmitting means, said magnetic sensor means including a magnetic core, an exciting coil wound on the magnetic core and a detection coil wound on the magnetic core; signal processing means, responsive to said sensor means, for generating a received pulse signal having a plurality of groups of pulses; controller means for receiving said received pulse signal from said signal processing means and generating a controller pulse signal when the number of pulses in any said group of pulses is within a predetermined range; and counter means for counting pulses in said controller pulse signal and generating said electric signal only when said counter means has counted in sequence a predetermined number of consecutive pulses indicative of an equivalent number of consecutive valid groups of pulses in said received pulse signal.
Claim 3
Dependent Claim
27 words
A device as defined in claim 1, wherein said magnetic core is ring-shaped and said detection coil is wound across a diameter of said ring-shaped magnetic core.
Claim 4
Dependent Claim
57 words
A device as defined in claim 2, wherein said signal processing means comprises: magnetic sensor exciting means for supplying an exciting signal of a constant frequency to said exciting coil of said magnetic sensor means; and detecting circuit means for amplifying, sample-and-holding, and pulse-shaping the output signal of said detection coil to generate said received pulse signal.
Claim 5
Dependent Claim
18 words
A device as defined in claim 1, wherein said generating means, modulating means and transmitting means are portable.
Claim 6
Dependent Claim
27 words
A device as defined in claim 1, further comprising means for prohibiting the generation of said electric signal when an ignition switch of said vehicle is closed.
Claim 7
Dependent Claim
64 words
A device as defined in claim 1, further comprising means for prohibiting the generation of the next electric signal for unlocking the lid during a predetermined length of time after the generation of said electric signal for unlocking the lid for enabling an operator to act near the lid after unlocking the lid without generating another electric signal during said predetermined length of time.
Claim 8
Dependent Claim
20 words
A device as defined in claim 1, wherein the lid provided in a vehicle is a lid of a trunk.
Claim 9
Dependent Claim
30 words
A device as defined in claim 7, wherein said transmitting means includes coil means, excited by said specific magnetic unlocking signal, for radiating magnetic power to said magnetic sensor means.
References Cited (Backward Citations)
US3233239A
Cited
US3168737A
Cited
US3196440A
Cited
US3488632A
Cited
US3879709A
Cited
US3937976A
Cited
US4143368A
Cited
US4362992A
Cited
US4405924A
Cited
US4413261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |