US4931793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for providing a warning when vehicles approach a common collision point
Assignee: Solitron Devices Inc
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Filing: 1988-07-01
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Granted: 1990-06-05
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Expires: 2008-07-01
Abstract
Abstract A system for providing a warning when at least two vehicles, first and second vehicles, are near a common collision point. The system includes closed loop verification between a first vehicle and a common collision point. The system includes a first transmitter for transmitting a first radio frequency signal, a first receiver for receiving the first radio frequency signal at the common collision point, a second transmitter for transmitting a second radio frequency signal from the common collision point to the first vehicle and to any approaching vehicles, a second receiver in a vehicle which can receive the second radio frequency signal and indicate that the first and second vehicles are near a common collision point, and a third receiver in the first vehicle for receiving the second radio frequency signal and for providing an indication that a closed loop between the first vehicle and the common collision point is functioning properly.
Inventors
- 👤 Norbert Fuhrmann
- 👤 Nick Friedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:04
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/16; G08G1/164
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
174 words
A system for providing a warning when a first vehicle and a second vehicle are near a common collision point, the first vehicle having an active state, said system comprising: first transmitter means for transmitting a first radio frequency signal from the first vehicle in response to either the first vehicle being in the active state or a first control signal; warning means for receiving said first radio frequency signal at the common collision point and for transmitting a second radio frequency signal from the common collision point in response to receiving said first radio frequency signal; first receiving means for receiving said second radio frequency signal at the first vehicle and for providing said first control signal in response to receiving said second radio frequency signal; and second receiving means for receiving said second radio frequency signal at the second vehicle and for providing an indication of receiving said second radio frequency signal so as to provide a warning that the first vehicle and the second vehicle are near the common collision point.
Claim 2
Independent Claim
174 words
A system for providing a warning when a first vehicle and a second vehicle are near a common collision point, the first vehicle having an active state, said system comprising: first transmitter means for transmitting a first radio frequency signal from the first vehicle in response to either the first vehicle being in the active state or a first control signal; warning means for receiving said first radio frequency signal at the common collision point and for transmitting a second radio frequency signal from the common collision point in response to receiving said first radio frequency signal; first receiving means for receiving said second radio frequency signal at the first vehicle and for providing said first control signal in response to receiving said second radio frequency signal; and second receiving means for receiving said second radio frequency signal at the second vehicle and for providing an indication of receiving said second radio frequency signal so as to provide a warning that the first vehicle and the second vehicle are near the common collision point.
Claim 3
Dependent Claim
55 words
A system according to claim 1, wherein said warning means comprises: third receiving means for receiving said first radio frequency signal and for providing a second control signal in response to receiving said first radio frequency signal; and second transmitter means for transmitting said second radio frequency signal in response to said second control signal.
Claim 4
Dependent Claim
44 words
A system according to claim 2, wherein said first transmitter means includes verification means for indicating proper operation of said first transmitter means, said warning means, and said second receiving means, in response to said first radio frequency signal and said first control signal.
Claim 5
Dependent Claim
23 words
A system according to claim 3, wherein said first transmitter means includes means for physically indicating transmission of said first radio frequency signal.
Claim 6
Dependent Claim
37 words
A system according to claim 3, wherein said first transmitter means includes means for encoding said first radio frequency signal, and wherein said third receiving means includes decoder means for decoding the encoded first radio frequency signal.
Claim 7
Dependent Claim
41 words
A system according to claim 2, wherein said second transmitter means includes encoder means for encoding said second radio frequency signal, and wherein each of said first and second receiving means includes means for decoding the encoded second radio frequency signal.
Claim 8
Dependent Claim
41 words
A system according to claim 3, wherein said second transmitter means includes encoder means for encoding said second radio frequency signal, and wherein each of said first and second receiving means includes means for decoding the encoded second radio frequency signal.
Claim 9
Dependent Claim
41 words
A system according to claim 5, wherein said second transmitter means includes encoder means for encoding said second radio frequency signal, and wherein each of said first and second receiving means includes means for decoding the encoded second radio frequency signal.
Claim 10
Independent Claim
252 words
A system for providing a warning when a vehicle and a train are near a railroad crossing, the train having a detector for detecting motion of the train and for providing a motion signal in response to said motion detection, said system comprising: train transmitter means for transmitting a first radio frequency signal from the train in response to at least one of the motion signal and a feedback signal; crossing receiver means for receiving said first radio frequency signal at the crossing and for providing a reception signal based on receiving said first radio frequency signal; crossing transmitter means for transmitting a second radio frequency signal from the crossing in response to said reception signal; train receiver means for receiving said second radio frequency signal at the train and for providing said feedback signal in response to receiving said second radio frequency signal; verification means for detecting transmission of said first radio frequency signal and for indicating proper transmission of said first radio frequency signal, proper reception of said first radio frequency signal by said crossing receiver means, proper transmission of said second radio frequency signal by said crossing transmitter means and proper reception of said second radio frequency signal by said train receiving means, in response to said detecting of transmission of said first radio frequency signal and said feedback signal; and vehicle receiving means for receiving said second radio frequency signal at the vehicle and for providing a warning that the train and the vehicle are near the crossing.
Claim 11
Independent Claim
252 words
A system for providing a warning when a vehicle and a train are near a railroad crossing, the train having a detector for detecting motion of the train and for providing a motion signal in response to said motion detection, said system comprising: train transmitter means for transmitting a first radio frequency signal from the train in response to at least one of the motion signal and a feedback signal; crossing receiver means for receiving said first radio frequency signal at the crossing and for providing a reception signal based on receiving said first radio frequency signal; crossing transmitter means for transmitting a second radio frequency signal from the crossing in response to said reception signal; train receiver means for receiving said second radio frequency signal at the train and for providing said feedback signal in response to receiving said second radio frequency signal; verification means for detecting transmission of said first radio frequency signal and for indicating proper transmission of said first radio frequency signal, proper reception of said first radio frequency signal by said crossing receiver means, proper transmission of said second radio frequency signal by said crossing transmitter means and proper reception of said second radio frequency signal by said train receiving means, in response to said detecting of transmission of said first radio frequency signal and said feedback signal; and vehicle receiving means for receiving said second radio frequency signal at the vehicle and for providing a warning that the train and the vehicle are near the crossing.
Claim 12
Dependent Claim
36 words
A system according to claim 9, wherein said train transmitter means includes means for encoding said first radio frequency signal, and wherein said crossing receiver means includes means for decoding the encoded first radio frequency signal.
Claim 13
Dependent Claim
41 words
A system according to claim 9, wherein said crossing transmitter means includes means for encoding said second radio frequency signal, and wherein said train receiver means and said vehicle receiving means include means for decoding the encoded second radio frequency signal.
Claim 14
Dependent Claim
41 words
A system according to claim 10, wherein said crossing transmitter means includes means for encoding said second radio frequency signal, and wherein said train receiver means and said vehicle receiving means include means for decoding the encoded second radio frequency signal.
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) | 1993-06-04 | 1993-12-04 | 1994-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-06-04 | 1997-12-04 | 1998-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-06-04 | 2001-12-04 | 2002-06-05 | $7700.00 | Window Closed / Lapsed |