Carburetor
US4447371A · kind A · utility
Inventor
Key dates
| Filing date | Jun 18, 1982 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Jun 18, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S261/56
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A side draft carburetor is disclosed in which an eccentrically mounted throttle plate is provided with an aperture for passage of air therethrough and for movement of the throttle plate over a nozzle block interferingly projecting into the main air passageway of the carburetor. The nozzle block is equipped with a nozzle for introducing fuel into a venturi passageway formed between the nozzle block and a cam surface located about the rotational axis of the throttle plate; the cam surface moving with the throttle plate to vary the size and shape of the venturi passageway at the point of fuel introduction. This produces a finely atomized fuel mixture substantially centrally of the main air stream for optimum diffusion of the incoming fuel. In a modified version, the variable venturi passageway is effected by a flexible leaf spring responsive to a cam surface movable with the throttle plate to produce a passageway varying between convergent and divergent form as the throttle plate moves between closed and open positions. In both embodiments, the variable venturi passageway is restricted to a finite cross section of the carburetor's main intake air passageway defined by the effective ap…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.