US3811418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle speed limiting device
Assignee: Aisin Corp
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Filing: 1971-05-03
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Granted: 1974-05-21
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Expires: 1991-05-03
Abstract
Abstract A speed-responsive switch coupled to a moving part of a vehicle is closed when the vehicle speed exceeds a predetermined limit to pass a current through an activating circuit including the coil of a solenoid thereby to activate the solenoid, which thereby operates to close a high-speed valve in the high-speed venturi (throat or barrel) of the carburetor of the vehicle engine and thereby to reduce the vehicle speed. When absolutely necessary, as in an emergency, the activating circuit is rendered temporarily inoperative by another switch, thereby permitting the vehicle to be driven at speeds above the limit.
Inventors
- 👤 N Sakakibara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:44
CPC Classifications
F; F02; F02M; F02M11/00; F02M11/02; F02D; F02D9/00; F02D2700/00; F02D2700/02; F02D2700/0217; F02D2700/0225; F02D2700/0228; F02D2700/0243
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A vehicle travelling-speed limiting device for a vehicle powered by an engine equipped with a carburettor having at least a first venturi for relatively slow speeds and a second venturi for high speeds, said first and second venturies having first and second throttle valves respectively, said carburettor having a high speed valve, the device comprising: actuating means coupled to said high speed valve and operating to close said high speed valve to reduce the vehicle travelling speed, said actuating means comprising a vacuum motor with an output rod coupled to said high speed valve, a changeover valve for selectively establishing communication between said vacuum motor and ambient atmosphere and alternatively to a vacuum region at throat sections of said first and second venturies, and a solenoid having an electromagnetic coil and plunger activated by said coil and coupled to said changeover valve; speed responsive means coupled to a moving part of the vehicle for sensing the travelling speed of the vehicle and operating to energize said actuating means when the vehicle travelling speed exceeds a predetermined limiting valve.
Claim 2
Dependent Claim
178 words
A vehicle travelling-speed limiting device for a vehicle powered by an engine equipped with a carburettor having at least a first venturi for relatively slow speeds and a second venturi for high speeds, said first and second venturies having first and second throttle valves respectively, said carburettor having a high speed valve, the device comprising: actuating means coupled to said high speed valve and operating to close said high speed valve to reduce the vehicle travelling speed, said actuating means comprising a vacuum motor with an output rod coupled to said high speed valve, a changeover valve for selectively establishing communication between said vacuum motor and ambient atmosphere and alternatively to a vacuum region at throat sections of said first and second venturies, and a solenoid having an electromagnetic coil and plunger activated by said coil and coupled to said changeover valve; speed responsive means coupled to a moving part of the vehicle for sensing the travelling speed of the vehicle and operating to energize said actuating means when the vehicle travelling speed exceeds a predetermined limiting valve.
Claim 3
Dependent Claim
56 words
A vehicle speed limiting device as claimed in claim 1 wherein said speed responsive means comprises an electrical power source, said electromagnetic coil and a speed responsive switch coupled to said moving part of the vehicle, said power source supplying power through said coil when said speed responsive switch is closed thereby to energize said solenoid.
Claim 4
Dependent Claim
36 words
A vehicle speed limiting device according to claim 1 in which said high-speed valve is installed in the second venturi, at a position downstream from a throat section thereof, in addition to Said second throttle valve.
Claim 5
Dependent Claim
19 words
A vehicle speed limiting device according to claim 1 in which said high-speed valve is disposed said second venturi.
Claim 6
Dependent Claim
84 words
A vehicle speed limiting device according to claim 1 in which said actuating means comprises a solenoid having an electromagnet coil and operating to produce an output and a mechanism for transmitting said output to the high-speed valve to operate the same, and said speed-responsive means comprises an electrical power source, said electromagnet coil, and a speed-responsive switch coupled to said moving part of the vehicle, said power source supplying power through said coil when said switch is closed thereby to activate the solenoid.
Claim 7
Dependent Claim
42 words
A vehicle speed limiting device according to claim 1 in which there is provided means operable in an emergency to render the speed limiting device temporarily inoperative thereby to permit the vehicle to be driven at speeds exceeding said predetermined limiting value.
Claim 8
Dependent Claim
37 words
A vehicle speed limiting device according to claim 1, wherein a warning lamp is connected in parallel with said electromagnet coil so as to provide a warning indication when the vehicle travelling speed exceeds said predetermined value.
Claim 9
Dependent Claim
49 words
A vehicle speed limiting device according to claim 2, wherein said speed responsive means further includes means operable in an emergency so that, even though said speed-responsive switch remains closed during an excessive vehicle travelling speed, said electromagnet coil is de-energized thereby temporarily over-ruling the vehicle speed limiting device.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |