US4691801A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle protection device
Assignee: Individual
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Filing: 1986-03-03
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Granted: 1987-09-08
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Expires: 2006-03-03
Abstract
Abstract An anti-theft system for vehicles, such as trucks, which is operated by a self-contained hand held transmitter. The system is enabled by activating the vehicle's parking brake system. The transmitter transmits a predetermined signal that activates/deactivates any one of a plurality of manually selected security systems only after the anti-theft system verifies the predetermined signal. Typical security systems lock the parking brake system or interrupt the fuel supply of the vehicle.
Inventors
- 👤 Yale Mann
- 👤 Pekka Sarssi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:58
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/20; B60R25/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
135 words
A vehicle anti-theft device for a truck having a parking brake system, said device comprising: (a) locking means for preventing operation of said truck; (b) a portable, battery operated infrared light transmitter comprising a manual switch for selectively activating emission of a; predetermined stream of light pulses and (c) a control unit, operable only after engagement of said parking brake system, said control unit comprising an infrared detector for receiving said stream of light pulses, a demodulator for converting said stream of light pulses to a digital data stream, and a microprocessor which compares said digital data stream to a digital identification code stored in a read only memory, said microprocessor enabling activation/deactivation of said locking means for preventing operation of said truck whenever said digital data stream is identical to said digital identification code.
Claim 2
Dependent Claim
135 words
A vehicle anti-theft device for a truck having a parking brake system, said device comprising: (a) locking means for preventing operation of said truck; (b) a portable, battery operated infrared light transmitter comprising a manual switch for selectively activating emission of a; predetermined stream of light pulses and (c) a control unit, operable only after engagement of said parking brake system, said control unit comprising an infrared detector for receiving said stream of light pulses, a demodulator for converting said stream of light pulses to a digital data stream, and a microprocessor which compares said digital data stream to a digital identification code stored in a read only memory, said microprocessor enabling activation/deactivation of said locking means for preventing operation of said truck whenever said digital data stream is identical to said digital identification code.
Claim 3
Dependent Claim
24 words
The vehicle anti-theft device of claim 1, wherein said locking means comprises a valve for controlling pressurization of air brake lines of said truck.
Claim 4
Dependent Claim
24 words
The vehicle anti-theft device of claim 1, wherein said locking means comprises a fuel line valve for interrupting delivery of fuel to said truck.
Claim 5
Dependent Claim
27 words
The vehicle anti-theft device of claims 2 or 3, wherein said valve is a bi-stable valve, capable of remaining in its present state without being continuously energized.
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) | 1990-09-07 | 1991-03-09 | 1991-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-07 | 1995-03-09 | 1995-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-07 | 1999-03-09 | 1999-09-08 | $7700.00 | Window Closed / Lapsed |