the valve member being of butterfly type

Full Title

Carburettors having pertinent characteristics not provided for in, or of interest apart from, the apparatus of preceding main groups F02M1/00 - F02M15/00 (apparatus for treating combustion-air, fuel, or fuel-air mixture by catalysts, electric means, magnetism, rays, sonic waves, or the like F02M27/00; combinations of carburettors and low-pressure fuel-injection apparatus F02M71/00) > Carburettors having one or more fuel passages opening in valve-member of air throttle > the valve member being of butterfly type