US3834484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-theft device for internal combustion engines
Assignee: Individual
•
Filing: 1972-04-05
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Granted: 1974-09-10
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Expires: 1992-04-05
Abstract
Abstract A keyboard with a plurality of push buttons thereon is mounted in the driver''s compartment and is connected by push rods to a new and improved valve mechanism in the fuel line adjacent the carburetor. The valves are arranged to operate only in a predetermined code to allow gas to flow when the ignition switch is turned to ''''on'''' position. A solenoid is de-energized to move the valves canceling the code when the ignition is turned off, and even though this sole electric part of the device should fail, the operation of the vehicle would be the same as though the theft-proof device were not present. Means is also operable to prevent the cancellation of the code at the operator''s will, so that the vehicle can be operated as normal.
Inventors
- 👤 A Sangster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:09
CPC Classifications
B; B60; B60R; B60R25/00; B60R25/01; B60R25/04; B60R25/042; Y; Y10; Y10T; Y10T137/00; Y10T137/7069; Y10T137/7131; Y10T137/7162; Y10T137/8593; Y10T137/87917; Y10T70/00; Y10T70/50; Y10T70/5889; Y10T70/5912; Y10T70/5916
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
250 words
Anti-theft device for internal combustion engines having a carburetor, source of fuel, ignition switch, battery, said device comprising a plurality of activators adapted to be manually actuated, a plurality of valves, means to operate each valve separately by an activator, said valves having selective combined positions causing blocking of the fuel supply to the carburetor and opening the same, certain valves being normally in fuel supply blocking position, whereby such blocking valves must be actuated by said means to allow fuel flow, the ignition switch being independent of said valves and said actuators, and the activators comprising flexible elongated members between the said means and the valves, a reset for the valves, means to actuate the reset upon opening of the ignition switch, cancellation means for the reset, ensuring that all valves are open upon opening of the ignition switch, means to inactivate the cancellation means, wherein the cancellation means comprises a movable plunger, an axial bore partway therein from an end thereof, a lateral recess in the plunger communicating with the recess, a laterally movable element in the recess, a rod in the bore engaging the movable element, means forming a bore receiving the plunger for slidable motion toward and away from the reset to lock the same and selectively to release it, an opening in the bore forming means to receive the element and lock the plunger in reset locking condition, the rod moving the plunger and element to reset locked condition and holding the same until retracted.
Claim 2
Dependent Claim
250 words
Anti-theft device for internal combustion engines having a carburetor, source of fuel, ignition switch, battery, said device comprising a plurality of activators adapted to be manually actuated, a plurality of valves, means to operate each valve separately by an activator, said valves having selective combined positions causing blocking of the fuel supply to the carburetor and opening the same, certain valves being normally in fuel supply blocking position, whereby such blocking valves must be actuated by said means to allow fuel flow, the ignition switch being independent of said valves and said actuators, and the activators comprising flexible elongated members between the said means and the valves, a reset for the valves, means to actuate the reset upon opening of the ignition switch, cancellation means for the reset, ensuring that all valves are open upon opening of the ignition switch, means to inactivate the cancellation means, wherein the cancellation means comprises a movable plunger, an axial bore partway therein from an end thereof, a lateral recess in the plunger communicating with the recess, a laterally movable element in the recess, a rod in the bore engaging the movable element, means forming a bore receiving the plunger for slidable motion toward and away from the reset to lock the same and selectively to release it, an opening in the bore forming means to receive the element and lock the plunger in reset locking condition, the rod moving the plunger and element to reset locked condition and holding the same until retracted.
Claim 3
Dependent Claim
208 words
Anti-theft device for internal combustion engines having a carburetor, fuel tank, battery, vacuum supply, a pressure supply, and ignition switch, said device comprising a push button assembly including a plurality of push buttons, a valve assembly, a passage for one of said supplies, a device operable by one of said supplies through the passage, a valve for fuel to the carburetor, said last-named device being connected to the fuel valve to open and close it, a plurality of movable valve bodies in the passage, each of these valve bodies having a transverse passage therein, each valve body having a position closing the passage and a position aligning its transverse passage with the passage so that the last-named device operates to open the fuel valve only when all the valve body transverse passages are aligned with the passage, a flexible rod connecting each push button to its respective valve body for motion of the latter by the former at will, certain of the valve bodies normally being positioned to align the transverse passages thereof with the passage and when actuated misaligning the same to close the passage, and certain of the valve bodies normally being positioned in misaligned condition relative to the passage and when actuated opening the same.
Claim 4
Dependent Claim
208 words
Anti-theft device for internal combustion engines having a carburetor, fuel tank, battery, vacuum supply, a pressure supply, and ignition switch, said device comprising a push button assembly including a plurality of push buttons, a valve assembly, a passage for one of said supplies, a device operable by one of said supplies through the passage, a valve for fuel to the carburetor, said last-named device being connected to the fuel valve to open and close it, a plurality of movable valve bodies in the passage, each of these valve bodies having a transverse passage therein, each valve body having a position closing the passage and a position aligning its transverse passage with the passage so that the last-named device operates to open the fuel valve only when all the valve body transverse passages are aligned with the passage, a flexible rod connecting each push button to its respective valve body for motion of the latter by the former at will, certain of the valve bodies normally being positioned to align the transverse passages thereof with the passage and when actuated misaligning the same to close the passage, and certain of the valve bodies normally being positioned in misaligned condition relative to the passage and when actuated opening the same.
Claim 5
Dependent Claim
21 words
The anti-theft device of claim 2 including an electrically operated device returning all valve bodies to normal position upon de-energization thereof.
Claim 6
Dependent Claim
17 words
The anti-theft device of claim 2 wherein the transverse passages in the valve bodies are non-uniformly positioned.
Claim 7
Dependent Claim
15 words
The anti-theft device of claim 4 wherein the valve bodies are reversible end to end.
Claim 8
Dependent Claim
28 words
The anti-theft device of claim 3 including means to cancel the operation of the valve body return device, and a push button to manually activate the cancelling means.
Claim 9
Dependent Claim
22 words
The anti-theft device of claim 6 including means to inactivate the cancelling means, and a push button to manually operate the same.
References Cited (Backward Citations)
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US3630306A
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US3653457A
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US3718202A
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US3670836A
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |