US3664313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carburetor
Assignee: Individual
•
Filing: 1970-02-24
•
Granted: 1972-05-23
•
Expires: 1990-02-24
Abstract
Abstract This invention involves a time delay in the opening of the power valve to cut out some or all of the power valve operation for city driving and still allow the power valve to come in for continued high power operation at power normally requiring a power valve enrichment to keep from over-heating the engine and valves at such continued high power. Such a power valve cut out for city driving with lower peak combustion temperatures for lower NOx (nitrous oxides) on city driving and lower temperatures of the exhaust valves, etc. over those temperatures that would exist if no power enrichment were used on continued high power operation. The method of timing the delay in power valve come in is by the use of a reservoir between the intake suction and the power valve piston with a check valve to hold suction in the reservoir and a very limited bleed down for delayed reduction of suction to operate the power valve.
Inventors
- 👤 Brooks Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:59
CPC Classifications
F; F02; F02M; F02M7/00; F02M7/12; F02M7/133
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
80 words
A carburetor, an engine, an intake manifold to which the carburetor is attached, said carburetor comprising a throttle valve, a power valve including an actuating device, a delay mechanism for delaying the opening of said power valve after operating at high suctions in the intake manifold and then suddenly operating at or near wide open throttle with low suctions, such mechanism allowing power valve open operation after delaying the opening of said power valve on continued operation at open throttle.
Claim 2
Dependent Claim
80 words
A carburetor, an engine, an intake manifold to which the carburetor is attached, said carburetor comprising a throttle valve, a power valve including an actuating device, a delay mechanism for delaying the opening of said power valve after operating at high suctions in the intake manifold and then suddenly operating at or near wide open throttle with low suctions, such mechanism allowing power valve open operation after delaying the opening of said power valve on continued operation at open throttle.
Claim 3
Dependent Claim
59 words
A device as defined in claim 1, said power valve being controlled by suction from said intake manifold on the engine side of said throttle valve, the opening of said power valve being delayed by the delay mechanism for more than 2 seconds after changing from said high intake suction operation to wide open throttle operation of said engine.
Claim 4
Dependent Claim
57 words
A device as defined in claim 1, in which the actuating device comprises power means to operate said power valve, said delay mechanism controlling said power means for the opening of said power valve after a predetermined time following the change of operation at high suction to operation at or near wide open throttle with low suction.
Claim 5
Dependent Claim
55 words
A device as defined in claim 3, in which the power means to open said power valve operates when the suction is less than 7 inches Hg intake suction, said delay occurring after operation at idle and quickly changing the throttle to operate at less than 7 inches Hg suction near wide open throttle operation.
Claim 6
Dependent Claim
97 words
A device as defined in claim 4, in which such delay is more than 4 seconds, said time delay mechanism involving a reservoir for suction from said intake manifold, a controlled bleed valve between said intake manifold and said reservoir, a bypass to said intake with a check valve allowing higher suction to flow from said intake to said reservoir freely but not from said reservoir to said intake manifold, said reservoir being connected to said actuating device to control the opening of said power valve when suction in said reservoir is less than a selected limit.
Claim 7
Dependent Claim
52 words
A device as defined in claim 1, said mechanism comprising a reservoir inserted between the intake manifold and the power valve actuator, said reservoir being connected to said intake manifold by an unrestricted line with a checK valve therein and a greatly restricted flow line from said reservoir to said intake manifold.
Claim 8
Dependent Claim
124 words
A carburetor, an engine having an intake manifold to which the carburetor is attached, said carburetor comprising a throttle valve, a power valve and an actuating device for opening said power valve, control means for operating the actuating device in response to low suction in the intake manifold, said control means including a timing mechanism initiated by a sudden operation of the engine at or near wide open throttle with low suction following operation at high suctions, said control means operating the actuating device to open the power valve a predetermined period of time following said sudden decrease in suction, said control means being operative only on continued said operation of the engine at low suction at least for the predetermined period of time.
Claim 9
Dependent Claim
124 words
A carburetor, an engine having an intake manifold to which the carburetor is attached, said carburetor comprising a throttle valve, a power valve and an actuating device for opening said power valve, control means for operating the actuating device in response to low suction in the intake manifold, said control means including a timing mechanism initiated by a sudden operation of the engine at or near wide open throttle with low suction following operation at high suctions, said control means operating the actuating device to open the power valve a predetermined period of time following said sudden decrease in suction, said control means being operative only on continued said operation of the engine at low suction at least for the predetermined period of time.
Claim 10
Dependent Claim
72 words
The apparatus defined in claim 7 wherein the timing mechanism includes a fluid reservoir connected by passageways between the intake manifold and the actuating device for operating the power valve, there being a pair of passageways between the manifold and reservoir, one of said pair of passageways being unrestricted to fluid flow in one direction and provided with a check valve, and the other of said pair greatly restricting the fluid flow.
Claim 11
Dependent Claim
15 words
The apparatus defined in claim 7 wherein the predetermined time is more than 2 seconds.
Claim 12
Dependent Claim
26 words
The apparatus defined in claim 7 wherein the power valve is opened by the control means at suctions below 7 inches of Hg in the manifold.
Claim 13
Dependent Claim
27 words
A device as defined in claim 6 in which said greatly restricted flow line includes means accessible exteriorly of the carburetor for adjusting the amount of restriction.
Claim 14
Dependent Claim
38 words
The apparatus defined in claim 8 in which the restriction of the fluid flow in the other of said pair of passages is provided by adjustable means accessible exteriorly of the carburetor for varying the amount of restriction.
References Cited (Backward Citations)
US3366194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-23 | 1975-11-22 | 1976-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-23 | 1979-11-22 | 1980-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-23 | 1983-11-22 | 1984-05-23 | $7700.00 | Window Closed / Lapsed |