with throttling valves sliding in a plane inclined to the passage

Full Title

Carburettors having air or fuel-air mixture passage throttling valves other than of butterfly type (register-type carburettors F02M11/00); Carburettors having fuel-air mixing chambers of variable shape or position > having throttling valves, e.g. of piston shape, slidably arranged transversely to the passage > with throttling valves sliding in a plane inclined to the passage