US3756341A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle anti-theft system
Assignee: Safetech Inc
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Filing: 1971-07-22
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Granted: 1973-09-04
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Expires: 1991-07-22
Abstract
Abstract The invention is a control device which prevents the operation of a motor vehicle by unauthorized persons. The system includes a fuel control valve which directly connects the fuel line to the carburetor or fuel injector. This valve is an electrically operated tamper-proof valve which remains closed except when it receives an electric control signal from a tamper-proof electric control box. The valve opening signal is fed from the control box when a particular code such as a 4, 5, 6 or 7 digit code is entered into the box by depressing several selected control buttons of a number of available control buttons. The control box itself has a tamper-proof metal outer casing which prevents unauthorized access to the electrical system but which includes a separate code operated electrical device for permitting the control box to be opened for maintenance or repair by authorized personnel.
Inventors
- 👤 W Tonkowich
- 👤 J Medvitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 08:35
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/01; B60R25/04; B60R25/042; Y; Y10; Y10T; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/554; Y10T70/5562; Y10T70/5889; Y10T70/5912; Y10T70/5916; Y10T70/5973; Y10T70/5978; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/7068
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
177 words
An anti-theft system for fluid fueled apparatus comprising the combination of: an electrically operated fluid control valve adapted for insertion into a fuel feed line for cutting off fuel flow to the apparatus; a source of electric power including a power output interrupting means; electrical means coupling said fluid control valve to the output of said source of electric power; said means for interrupting the electric power supply output to said valve including a code actuated switching means; a control box for said switching means including a removable panel; an electric lock for releasably coupling said panel to said control box; said lock having a movable plunger releasably connecting said panel to the remaining portions of said box and having a plunger operating solenoid for moving said plunger and releasing said panel; said solenoid being electrically coupled to said power supply output for operation thereby; and a hardened metal shield member positioned betWeen said plunger and the adjacent wall portions of said control box for limiting access to the plunger through the wall of said control box.
Claim 2
Dependent Claim
177 words
An anti-theft system for fluid fueled apparatus comprising the combination of: an electrically operated fluid control valve adapted for insertion into a fuel feed line for cutting off fuel flow to the apparatus; a source of electric power including a power output interrupting means; electrical means coupling said fluid control valve to the output of said source of electric power; said means for interrupting the electric power supply output to said valve including a code actuated switching means; a control box for said switching means including a removable panel; an electric lock for releasably coupling said panel to said control box; said lock having a movable plunger releasably connecting said panel to the remaining portions of said box and having a plunger operating solenoid for moving said plunger and releasing said panel; said solenoid being electrically coupled to said power supply output for operation thereby; and a hardened metal shield member positioned betWeen said plunger and the adjacent wall portions of said control box for limiting access to the plunger through the wall of said control box.
Claim 3
Dependent Claim
35 words
The anti-theft system as claimed in claim 1 in which said panel has angularly positioned flanges at exposed edges, and cooperating lip means positioned on interior portions of said control box for receiving said flanges.
Claim 4
Dependent Claim
57 words
The anti-theft system as claimed in claim 1 in which said means coupling said valve to said source of electric power comprises a multi-strand cable, a plurality of said strands being intermingled with the remaining strands and having their adjacent ends electrically connected to one another, and all of said strands being encapsulated with a coating compound.
Claim 5
Dependent Claim
18 words
The means as claimed in claim 3 which further comprises a heat shrunk surrounding all of said strands.
Claim 6
Dependent Claim
87 words
The anti-theft system as claimed in claim 1 in which said means coupling said valve to said source of electric power comprises a multi-strand cable, a plurality of said strands comprising a fractional portion only being intermingled with the remaining strands and having their adjacent ends electrically connected to one another to form a first conductor, and a plurality of additional strands comprising a fractional portion only and being intermingled with all other strands having their adjacent ends connected to one another to form a second conductor.
Claim 7
Dependent Claim
20 words
The means as claimed in claim 5 in which further comprises a heat shrunk sheath surrounding all of said strands.
Claim 8
Dependent Claim
18 words
The means as claimed in claim 5 which further comprises a coating compound encapsulating all of said strands.
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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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |