Patent EP0081765B1 successfully refreshed from Google Patents.
EP0081765B1
Expired / Lapsed
EP
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Theft protection device for motor vehicles
Assignee: Bayerische Motoren Werke AG
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Filing: 1982-12-02
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Granted: 1986-04-02
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Expires: 2002-12-02
Abstract
No abstract record available.
Inventors
- 👤 Arnost Proske
- 👤 Walter Weishaupt
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 15:14
CPC Classifications
G; G07; G07C; G07C9/00; G07C9/00174; G07C9/00182; G07C2009/00753; G07C2009/00769; G07C2009/00785
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
113 words
Anti-theft security apparatus for motor vehicles, having a first transmitter for the wire-less and contact-less transmission of a code signal to a receiver situated in or on the vehicle which renders use of the motor vehicle possible in the case of conformity of the code signal with a stored code signal, characterised by a second transmitter for a second signal of like nature, the orientation of which is differently selected from that of the transmitter (8) for the code signal (I) in such a way that, if the code signal transmitter (8) is orientated to the receiver (2), the second signal arrives only considerably attenuated or not at all at the receiver (2).
Claim 2
Dependent Claim
113 words
Anti-theft security apparatus for motor vehicles, having a first transmitter for the wire-less and contact-less transmission of a code signal to a receiver situated in or on the vehicle which renders use of the motor vehicle possible in the case of conformity of the code signal with a stored code signal, characterised by a second transmitter for a second signal of like nature, the orientation of which is differently selected from that of the transmitter (8) for the code signal (I) in such a way that, if the code signal transmitter (8) is orientated to the receiver (2), the second signal arrives only considerably attenuated or not at all at the receiver (2).
Claim 3
Dependent Claim
17 words
Apparatus according to Claim 1, characterised in that the second signal is a jamming signal (II) .
Claim 4
Dependent Claim
54 words
Apparatus according to Claim 1, characterised in that the second signal is another code signal (I') of like nature which, in the case of orientation of the first transmitter (8) for the (first) code signal (I) upon the pertinent (first) receiver (2), impinges upon a second receiver (2') in or on the vehicle (1).
Claim 5
Dependent Claim
26 words
Apparatus according to one of Claims 1 to 3, characterised in that the second transmitter (10') is arranged in or on the motor vehicle (1 ).
Claim 6
Dependent Claim
22 words
Apparatus according to Claim 4, characterised in that the second transmitter (10') is seated approximately at the location of the receiver (2).
Claim 7
Dependent Claim
21 words
Apparatus according to Claim 4 or 5, characterised in that the second transmitter (10') is activated by the first transmitter (8).
Claim 8
Dependent Claim
24 words
Apparatus according to Claim 6, characterised in that the second transmitter (10) is activated by the code signal emitted by the first transmitter (8).
References Cited (Backward Citations)
No citation records indexed.
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