Carbureter of the overflow type

Claim 1

An overflow type carburetor comprising a carburetor body forming a horizontal mixing passage including a Venturi portion, walls means secured to said carburetor body and forming a fuel chamber located below said mixing passage, a main nozzle support tube positiOned within said fuel chamber, said main nozzle support tube having a main nozzle at its upper end in communication with said Venturi portion of said mixing passage and having a main jet at its lower end within said fuel chamber, an upright wall located within said fuel chamber dividing it into a fuel well and an overflow chamber, an upright cylindrical partition wall positioned within said fuel well inwardly from said upright wall and dividing said fuel well into an inner chamber containing said main nozzle support tube with said main jet thereof located below the upper end of said cylindrical partition wall and an annular space encircling said inner chamber, the upper end of said cylindrical partition wall located below the upper end of said cylindrical partition wall located below the upper end of said upright wall, said wall means including an inlet port communicating with said annular space for supplying fuel from a supply source into said fuel well and an outlet port in communication with the base of said overflow chamber for returning excess fuel to the supply source so that said cylindrical partition wall affords a stabilized fuel layer in said inner chamber in the vicinity of said main jet for preventing fluctuations in the quantity of fuel injected into said mixing passage.