Patent US5552641A successfully refreshed from Google Patents.
US5552641A
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Remote-control access control device and method for operating the same
Assignee: Aumovio Germany GmbH
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Filing: 1994-09-02
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Granted: 1996-09-03
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Expires: 2014-09-02
Abstract
Abstract A remote-control access control device, particularly for motor vehicles, includes a stationary transmitter and receiver unit responding to actuation of tripping means for transmitting a question code signal, receiving an answer code signal, and furnishing an unlocking signal to an unlocking unit if the answer code signal matches a command code signal. A portable transponder has a receiver receiving the question code signal and a transmitter transmitting the answer code signal. The question code signal is repeatedly transmitted if no answer code signal has been received in response to an initial transmission, and a signal parameter is modified upon transmission of the answer code signal as a function of a field intensity of the question code signal or of a battery voltage of the transponder. Alternatively, a signal parameter is modified when the answer code signal is transmitted if an information content of the question code signal indicates an emergency operation state. As another alternative, the transmitter and receiver unit has both a transmission channel for receiving signals of low field intensity and a transmission channel for receiving signals of high field intensity. A method is also provided for operating the access control device.
Inventors
- 👤 Robert Fischer
- 👤 Johannes Ilg
- 👤 Christian Schneider
- 👤 Ulrich Schrey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:31
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G06K19/07; G06K19/0701; G06K19/0712; B; B60; B60R; B60R25/00; B60R25/01; B60R25/04; B60R25/40; B60R25/406; G06K19/0707; G07; G07C; G07C9/00; G07C9/00174; G07C9/00309; E; E05; E05B; E05B85/00; E05B85/01; G07C2009/00341; G07C2009/00357; G07C2009/0042; G07C2009/00476; G07C2009/00484; G07C2009/00579; G07C2009/00587; G07C2009/00753; G07C2009/00769; G07C2009/00793
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
142 words
A remote-control access control device, comprising: tripping means; an unlocking unit; a stationary transmitter and receiver unit responding to actuation of said tripping means for transmitting a question code signal with a field intensity, receiving an answer code signal, and furnishing an unlocking signal to said unlocking unit if the answer code signal matches a command code signal; a portable transponder having a receiver receiving the question code signal, a transmitter transmitting the answer code signal, and a battery voltage; and said stationary transmitter and receiver unit repeatedly transmitting the question code signal if no answer code signal has been received in response to an initial transmission, and means for modifying a signal parameter upon transmission of the answer code signal as a function of one of the field intensity of the question code signal and the battery voltage of the transponder.
Claim 2
Dependent Claim
142 words
A remote-control access control device, comprising: tripping means; an unlocking unit; a stationary transmitter and receiver unit responding to actuation of said tripping means for transmitting a question code signal with a field intensity, receiving an answer code signal, and furnishing an unlocking signal to said unlocking unit if the answer code signal matches a command code signal; a portable transponder having a receiver receiving the question code signal, a transmitter transmitting the answer code signal, and a battery voltage; and said stationary transmitter and receiver unit repeatedly transmitting the question code signal if no answer code signal has been received in response to an initial transmission, and means for modifying a signal parameter upon transmission of the answer code signal as a function of one of the field intensity of the question code signal and the battery voltage of the transponder.
Claim 3
Dependent Claim
27 words
The access control device according to claim 1, wherein said transmitter and receiver unit has at least two transmission channels for receiving signals with different signal parameters.
Claim 4
Dependent Claim
25 words
The access control device according to claim 1, wherein said tripping means are a door handle being electrically connected to said transmitter and receiver unit.
Claim 5
Dependent Claim
31 words
The access control device according to claim 1, including a logic circuit, said tripping means being a key of said transponder being electrically connected through said logic circuit to said transmitter.
Claim 6
Dependent Claim
68 words
The access control device according to claim 1, including a main voltage source connected to said transmitter and receiver unit, and an emergency voltage source connected to said transmitter and receiver unit for supplying said transmitter and receiver unit and said unlocking unit with energy as needed, in the event of failure of said main voltage source, if the answer code signal received matches the command code signal.
Claim 7
Dependent Claim
20 words
The access control device according to claim 1, wherein said transmitter and receiver unit is disposed in a motor vehicle.
Claim 8
Dependent Claim
29 words
The access control device according to claim 1, wherein said tripping means are a question code signal being transmitted cyclically at time intervals by said transmitter and receiver unit.
Claim 9
Dependent Claim
46 words
The access control device according to claim 1, wherein said transponder has an emergency voltage source for buffer-storing or drawing some energy contained in the question code signal being sufficient to transmit the answer code signal, if there is an inadequate energy supply in said transponder.
Claim 10
Dependent Claim
101 words
A remote-control access control device, comprising: tripping means; an unlocking unit; a stationary transmitter and receiver unit responding to actuation of said tripping means for transmitting a question code signal, receiving an answer code signal, and furnishing an unlocking signal to said unlocking unit if the answer code signal matches a command code signal; a portable transponder having a receiver receiving the question code signal and a transmitter transmitting the answer code signal; and means for modifying a signal parameter when the answer code signal is transmitted if an information content of the question code signal indicates an emergency operation state.
Claim 11
Dependent Claim
101 words
A remote-control access control device, comprising: tripping means; an unlocking unit; a stationary transmitter and receiver unit responding to actuation of said tripping means for transmitting a question code signal, receiving an answer code signal, and furnishing an unlocking signal to said unlocking unit if the answer code signal matches a command code signal; a portable transponder having a receiver receiving the question code signal and a transmitter transmitting the answer code signal; and means for modifying a signal parameter when the answer code signal is transmitted if an information content of the question code signal indicates an emergency operation state.
Claim 12
Dependent Claim
27 words
The access control device according to claim 9, wherein said transmitter and receiver unit has at least two transmission channels for receiving signals with different signal parameters.
Claim 13
Dependent Claim
25 words
The access control device according to claim 9, wherein said tripping means are a door handle being electrically connected to said transmitter and receiver unit.
Claim 14
Dependent Claim
31 words
The access control device according to claim 9, including a logic circuit, said tripping means being a key of said transponder being electrically connected through said logic circuit to said transmitter.
Claim 15
Dependent Claim
29 words
The access control device according to claim 9, wherein said tripping means are a question code signal being transmitted cyclically at time intervals by said transmitter and receiver unit.
Claim 16
Dependent Claim
46 words
The access control device according to claim 9, wherein said transponder has an emergency voltage source for buffer-storing or drawing some energy contained in the question code signal being sufficient to transmit the answer code signal, if there is an inadequate energy supply in said transponder.
Claim 17
Dependent Claim
68 words
The access control device according to claim 9, including a main voltage source connected to said transmitter and receiver unit, and an emergency voltage source connected to said transmitter and receiver unit for supplying said transmitter and receiver unit and said unlocking unit with energy as needed, in the event of failure of said main voltage source, if the answer code signal received matches the command code signal.
Claim 18
Dependent Claim
20 words
The access control device according to claim 9, wherein said transmitter and receiver unit is disposed in a motor vehicle.
Claim 19
Dependent Claim
101 words
remote-control access control device, comprising: tripping means; an unlocking unit; a stationary transmitter and receiver unit responding to actuation of said tripping means for transmitting a question code signal, receiving an answer code signal, and furnishing an unlocking signal to said unlocking unit if the answer code signal matches a command code signal; and a portable transponder having a transmitter transmitting the answer code signal and a receiver receiving the question code signal; said transmitter and receiver unit having both a transmission channel for receiving signals of low field intensity and a transmission channel for receiving signals of high field intensity.
Claim 20
Dependent Claim
101 words
remote-control access control device, comprising: tripping means; an unlocking unit; a stationary transmitter and receiver unit responding to actuation of said tripping means for transmitting a question code signal, receiving an answer code signal, and furnishing an unlocking signal to said unlocking unit if the answer code signal matches a command code signal; and a portable transponder having a transmitter transmitting the answer code signal and a receiver receiving the question code signal; said transmitter and receiver unit having both a transmission channel for receiving signals of low field intensity and a transmission channel for receiving signals of high field intensity.
Claim 21
Dependent Claim
25 words
The access control device according to claim 17, wherein said tripping means are a door handle being electrically connected to said transmitter and receiver unit.
Claim 22
Dependent Claim
31 words
The access control device according to claim 17, including a logic circuit, said tripping means being a key of said transponder being electrically connected through said logic circuit to said transmitter.
Claim 23
Dependent Claim
29 words
The access control device according to claim 17, wherein said tripping means are a question code signal being transmitted cyclically at time intervals by said transmitter and receiver unit.
Claim 24
Dependent Claim
46 words
The access control device according to claim 17, wherein said transponder has an emergency voltage source for buffer-storing or drawing some energy contained in the question code signal being sufficient to transmit the answer code signal, if there is an inadequate energy supply in said transponder.
Claim 25
Dependent Claim
68 words
The access control device according to claim 17, including a main voltage source connected to said transmitter and receiver unit, and an emergency voltage source connected to said transmitter and receiver unit for supplying said transmitter and receiver unit and said unlocking unit with energy as needed, in the event of failure of said main voltage source, if the answer code signal received matches the command code signal.
Claim 26
Dependent Claim
20 words
The access control device according to claim 17, wherein said transmitter and receiver unit is disposed in a motor vehicle.
Claim 27
Dependent Claim
22 words
The access control device according to claim 17, wherein the answer code signal is received simultaneously by both of said transmission channels.
Claim 28
Independent Claim
131 words
A method for operating a remote-access control device, which comprises: transmitting a question code signal from a stationary transmitter and receiver unit upon actuation of tripping means; receiving the question code signal at a transponder and transmitting an answer code signal from the transponder to the transmitter and receiver unit; comparing the answer code signal with a command code signal in the transmitter and receiver unit, and sending an unlocking signal to an unlocking unit if the answer code signal and the command code signal match; bringing the transponder to the vicinity of the transmitter and receiver unit and modifying a signal parameter if no unlocking signal has been tripped after the initial actuation of the tripping means; and actuating the tripping means once again for transmitting the question code signal.
Claim 29
Independent Claim
131 words
A method for operating a remote-access control device, which comprises: transmitting a question code signal from a stationary transmitter and receiver unit upon actuation of tripping means; receiving the question code signal at a transponder and transmitting an answer code signal from the transponder to the transmitter and receiver unit; comparing the answer code signal with a command code signal in the transmitter and receiver unit, and sending an unlocking signal to an unlocking unit if the answer code signal and the command code signal match; bringing the transponder to the vicinity of the transmitter and receiver unit and modifying a signal parameter if no unlocking signal has been tripped after the initial actuation of the tripping means; and actuating the tripping means once again for transmitting the question code signal.
Claim 30
Dependent Claim
72 words
The method according to claim 25, which comprises transmitting a further question code signal from the transmitter and receiver unit if further tripping means are actuated, thereupon transmitting a further answer code signal from the transponder if the transponder is detected as being located inside a motor vehicle, and transmitting an engine starting signal from a control unit disposed in the vehicle, if the answer code signal matches a command code signal.
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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) | 1999-09-03 | 2000-03-04 | 2000-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-03 | 2004-03-04 | 2004-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-03 | 2008-03-04 | 2008-09-03 | $7700.00 | Window Closed / Lapsed |