Patent ID: 8579265
Filing Date: 2013-11-12
Classification: F02M

Abstract:
1. A simple start ratchet carburetor comprising: a carburetor body; an inlet tube communicated with the carburetor body for forming a fuel passage; a fuel passage of a measuring room arranged in the carburetor; and a main fuel supply cavity molded integrally with the carburetor body, which comprises a choke subassembly, a venturi, and a throttle subassembly, with the choke subassembly comprising a choke plate and a choke shaft, and the choke plate being mounted on the choke shaft, the throttle subassembly comprising a throttle plate and a throttle shaft, and the throttle plate being mounted on the throttle shaft by a screw, the choke shaft and the throttle shaft both being pivotally connected to the carburetor body, and two ends of both the choke shaft and the throttle shaft being protruded from the carburetor body to form linkage ends and control ends respectively; wherein the end of the throttle shaft protruding from the carburetor body provides a first pawl, a second pawl and a hand cranking block, the first pawl and the second pawl both are mounted on one end of the throttle shaft by a fastener which limits the location between the pawls and the throttle shaft, while the hand cranking block is mounted on the other end of the throttle shaft, the end of the choke shaft protruding from the carburetor body provides a first ratchet and a second ratchet, the first ratchet and the second ratchet are mounted on one end which is the same end for the first pawl and the second pawl to mount thereon of the throttle shaft, by a fastener which limits the location between the ratchets and the choke shaft, the carburetor body further comprises an air removing device consisting of fuel pipes, a valve rod, a swing block, a fuel pumping ball seat and a fuel pumping ball located on the fuel pumping ball seat, two ends of each fuel pipe are connected with the fuel pumping ball seat and the carburetor body respectively to form a fuel passage, one end of the valve rod is mounted on the fuel pumping ball seat, and the other end has a flexible connection with the swing block, the movement of the swing block provided by the air removing device drives the first ratchet, the second ratchet, the first pawl and the second pawl which forms a ratchet mechanism; the carburetor body further comprises a shut-off valve device, the air removing device drives the first ratchet and the second ratchet, so as to rotate the choke shaft, then the choke shaft controls the opening or closing of the shut-off valve device.