Floatless carburetor with integral primer system
AssigneeBriggs & Stratton Corporation
InventorsThomas G. Guntly, Jerome L. Rasmussen, Richard T. Anderson
Life of this patent
Estimating the term…
Abstract
A floatless carburetor with a fuel reservoir in communication with the carburetor throttle bore includes an integral primer system which is operable to introduce fuel directly into both the carburetor throttle bore and the fuel reservoir. A plurality of check valves control flow of fuel from the fuel tank into the primer system and into the throttle bore and fuel reservoir. The carburetor and primer system are adapted to be operated in conjunction with an impulse-type fuel pump, wherein the primer system is operable to manually pump fuel into the reservoir when the fuel pump is not functioning.
Claims11
A primer circuit for a carburetor for an internal combustion engine, the carburetor of the type having an air intake, a throttle chamber, an induction chamber, and a fuel reservoir from which fuel is drawn into the throttle chamber where it is mixed with air introduced at the air intake and released into the induction chamber to support combustion in the engine, the fuel reservoir of the carburetor being in direct communication with a fuel tank, the primer circuit comprising:
- a. an expandable/contractable primer chamber;
- b. means communicating the primer chamber with the fuel tank;
- c. means communicating the primer chamber with both the throttle chamber and the fuel reservoir of the carburetor;
- d. first valve means between the fuel tank and the primer chamber and selectively movable between an open position when the primer chamber is expanded and a closed position when the primer chamber is contracted;
- e. second valve means between the throttle chamber and the primer chamber and selectively movable between an open position when the primer chamber is contracted and a closed positon when the primer chamber is expanded;
- and
- f. third valve means between the fuel reservoir and the primer chamber and selectively movable between an open position when the primer chamber is contracted and a closed position when the primer chamber is expanded.
A carburetor and primer assembly for delivering fuel from a fuel tank to an internal combustion engine, comprising:
- a. carburetor body including a base, a primer chamber, an air intake port, a throttle chamber and an outlet;
- b. a fuel tank adapter secured to the carburetor base and including a fuel reservoir in communication with both the carburetor throttle chamber and the primer chamber;
- c. first means associated with the fuel tank for drawing fuel from the fuel tank directly into the primer chamber;
- and
- d. second means associated with the fuel tank for drawing fuel from the fuel tank directly into the reservoir.
Dependencies are inferred from the claim text.