US4050436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Idle system blocking means
Assignee: Individual
•
Filing: 1976-03-17
•
Granted: 1977-09-27
•
Expires: 1996-03-17
Abstract
Abstract A device is disclosed which may prevent engine dieseling, fuel waste, and reduce exhaust emissions by preventing idle system fuel mixture from entering the carburetor of a vehicle at various times.
Inventors
- 👤 Roger A. Crabtree
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:13
CPC Classifications
F; F02; F02B; F02B77/00; F02B77/08; F02M; F02M3/00; F02M3/02; F02B3/00; F02B3/06; Y; Y10; Y10S; Y10S123/00; Y10S123/11; Y10S261/00; Y10S261/74
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
188 words
A device which may be attached to an existing carburetor and which controls the discharge of idle system fuel mixture into said carburetor comprising blocking means placed into the idle fuel discharge port of said carburetor whereby idle system fuel mixture cannot pass said blocking means to be discharged into said carburetor; a power source; switch means responsively closed at ignition turn-off, operative to activate said blocking means through said power source simultaneously with ignition turn-off whereby excess idle system fuel mixture can be prevented from entering said carburetor to prevent engine dieseling; and time delay means connected in a series circuit with said power source and said switch means, operative to control the length of time said series circuit is closed after said switch means is closed responsive to the turn-off of said ignition, whereby said device prevents engine dieseling by holding said blocking means within said idle fuel discharge port for a pre-determined time after said ignition is turned off, and then opening said series circuit by said time delay means, after said pre-determined time, thereby removing said blocking means from said idle fuel discharge port.
Claim 2
Independent Claim
188 words
A device which may be attached to an existing carburetor and which controls the discharge of idle system fuel mixture into said carburetor comprising blocking means placed into the idle fuel discharge port of said carburetor whereby idle system fuel mixture cannot pass said blocking means to be discharged into said carburetor; a power source; switch means responsively closed at ignition turn-off, operative to activate said blocking means through said power source simultaneously with ignition turn-off whereby excess idle system fuel mixture can be prevented from entering said carburetor to prevent engine dieseling; and time delay means connected in a series circuit with said power source and said switch means, operative to control the length of time said series circuit is closed after said switch means is closed responsive to the turn-off of said ignition, whereby said device prevents engine dieseling by holding said blocking means within said idle fuel discharge port for a pre-determined time after said ignition is turned off, and then opening said series circuit by said time delay means, after said pre-determined time, thereby removing said blocking means from said idle fuel discharge port.
Claim 3
Dependent Claim
79 words
A device according to claim 1 whereby said blocking means comprises: a. a plunger operative to be placed into said idle fuel discharge port to prevent said idle system fuel mixture from passing into said carburetor; and b. force means operative when energized to force said plunger into said idle fuel discharge port; Whereby excess idle system fuel mixture can be prevented from entering said carburetor to prevent dieseling and to enable fuel savings and reduce undesirable exhaust emissions.
Claim 4
Dependent Claim
23 words
A device according to claim 2 wherein said blocking means further comprises securing means operative to attach said blocking means to said carburetor.
Claim 5
Dependent Claim
20 words
A device according to claim 3 wherein said securing means comprises a threaded section which is screwed into said carburetor.
Claim 6
Dependent Claim
35 words
A device according to claim 3 wherein said blocking means further comprises adjusting means operative to vary the distance between said plunger and said idle fuel discharge port when said force means is not energized.
Claim 7
Dependent Claim
20 words
A device according to claim 2 wherein said force means comprises a solenoid which may be energized by electrical energy.
Claim 8
Dependent Claim
22 words
A device according to claim 2 wherein said force means comprises a diaphram force means which may be energized by air pressure.
Claim 9
Dependent Claim
34 words
A device according to claim 6 further comprising a plunger stop, a spring to keep said plunger against said plunger stop when said solenoid is not energized, and electrical wiring connected to said solenoid.
Claim 10
Dependent Claim
52 words
A device according to claim 7 wherein said diaphram force means comprises an air pressure opening, a diaphram, which under sufficient air pressure, will press against said plunger, a plunger stop, and a spring to keep said plunger against said diaphram at said plunger stop when sufficient air pressure is not applied.
Claim 11
Dependent Claim
33 words
A device according to claim 2 wherein said plunger comprises a tapered end which is placed into said idle fuel discharge port to prevent said idle fuel mixture from passing into said carburetor.
Claim 12
Dependent Claim
33 words
A device according to claim 2 further comprising a vacuum controlled switch means which is operative to connect said power source to said force means when a vacuum appears at a pre-designated point.
Claim 13
Dependent Claim
14 words
A device according to claim 2 wherein said power source is a vehicle battery.
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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) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |