| 摘要 |
A vent changeover device for carburetors comprising two working ends provided on a piston rod of a piston moving in a suction chamber, one of which constitutes a rod end of the piston and the other of which constitutes an angle member joined to an end portion of the piston rod, an inner valve being actuated by the angle member so as to open and close an inner vent, an outer valve being actuated by the rod end so as to open and close an outer vent and disposed so as to face in a direction opposite to the direction in which the inner valve faces, and springs biasing the inner and outer valves, respectively, in vent-closing directions, the vents communicating with the fuel bowl via the respective valves, the inner and outer valves being adapted to be actuated in accordance with the movement of the piston rod such that when one of the valves is opened, the other is closed, the inner vent being opened only when the engine is rotated, and the outer vent being opened only when the engine is stopped.
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