US4034727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automotive engine carburetor
Assignee: Nissan Motor Co Ltd
•
Filing: 1975-12-22
•
Granted: 1977-07-12
•
Expires: 1995-12-22
Abstract
Abstract A float bowl of an automotive engine carburetor is air-tightly covered by a diaphragm which is securely fixed to an electromagnetic transducer to be vibrated for controlling air pressure acting on the fuel being confined within the float bowl, whereby the amount of fuel delivered to the engine from the float bowl is controlled in dependence of the electrical signal applied.
Inventors
- 👤 Shigeo Aono
- 👤 Makoto Anzai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:57
CPC Classifications
F; F02; F02D; F02D35/00; F02D35/0015; F02D35/0046; F02D35/0053; F02D35/0069; F02D41/00; F02D41/02; F02D41/14; F02D41/1438; F02D41/1477; F02D41/1479; F02M; F02M7/00; F02M7/10; F02M7/11; Y; Y10; Y10S; Y10S261/00; Y10S261/67; Y10S261/74
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
80 words
An automotive engine carburetor comprising: a venturi; a float bowl for confining fuel therein; a fuel passage provided between said float bowl and said venturi; a diaphragm covering said float bowl providing an airtight seal therefor; and means responsive to an electrical signal applied thereto driving said diaphragm in order to control the pressure acting on the fuel being confined within said float bowl so as to regulate the amount of fuel sucked into said venturi through said fuel passage.
Claim 2
Dependent Claim
80 words
An automotive engine carburetor comprising: a venturi; a float bowl for confining fuel therein; a fuel passage provided between said float bowl and said venturi; a diaphragm covering said float bowl providing an airtight seal therefor; and means responsive to an electrical signal applied thereto driving said diaphragm in order to control the pressure acting on the fuel being confined within said float bowl so as to regulate the amount of fuel sucked into said venturi through said fuel passage.
Claim 3
Dependent Claim
33 words
An automotive engine carburetor as claimed in claim 1, wherein the magnitude of said electrical signal depends on an electrical signal derived from an exhaust gas sensor provided in an exhaust gas pipe.
Claim 4
Dependent Claim
18 words
An automotive engine carburetor as claimed in claim 1, further comprising means for damping vibrations of said diaphragm.
Claim 5
Dependent Claim
50 words
An automotive engine carburetor as claimed in claim 1, wherein said means comprises, a coil assembly securely fixed to a fixed member and disposed in the vicinity of said coil assembly in a manner to cause a relative movement therewith upon said electrical signal being applied to said coil assembly.
Claim 6
Dependent Claim
57 words
An automotive engine carburetor as claimed in claim 1, wherein said means comprises, a magnet securely fixed to said diaphragm, and a coil assembly securely fixed to a fixed member and disposed in the vicinity of said magnet in a manner to cause a relative movement therewith upon said electrical signal being applied to said coil assembly.
Claim 7
Dependent Claim
22 words
An automotive engine carburetor as claimed in claim 3, further comprising means for allowing said float bowl to communicate with the atmosphere.
Claim 8
Dependent Claim
26 words
An automotive engine carburetor as claimed in claim 6, wherein said means for allowing said float bowl to communicate with the atmosphere is an electromagnetic valve.
References Cited (Backward Citations)
US1329309A
Cited
US1906982A
Cited
US3345045A
Cited
US3730157A
Cited
US3974813A
Cited
US3921612A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |