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US 5,676,887 AGranted
Floatless carburetor
AssigneeMikuni Corporation
InventorsIsamu Soeda, Michihiko Aoshima
Life of this patent
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AssigneeMikuni Corporation
InventorsIsamu Soeda, Michihiko Aoshima
Estimating the term…
An orifice assembly is detachably attached to a cover serving as a wall surface of an atmospheric chamber. The orifice assembly includes two inner and outer communication ports in a housing thereof. The two inner and outer communication ports are shut out by a partition wall through which an orifice having a small diameter and a communication hole having a diameter larger than that of said orifice, and a check valve is disposed in the communication hole to close the latter therewith. One of the two inner and outer communication ports is communicated with an atmospheric chamber and the other inner and outer communication ports is communicated with the atmosphere. When the pressure in the atmospheric chamber becomes higher than the atmospheric pressure, the communication hole is closed with the check valve, and when the pressure in the atmospheric chamber 48 is equal to or becomes lower than the atmospheric pressure, the communication hole is opened.
In a floatless carburetor including a fuel regulating chamber defined by a main diaphragm and an atmospheric chamber leading to the atmosphere for feeding fuel in a suction passage via said fuel regulating chamber by delivering fuel to said fuel regulating chamber by pumping means, the improvement wherein said floatless carburetor includes an orifice having a small diameter and an opening/closing communication hole having a diameter larger than that of said orifice between said atmospheric chamber and the atmosphere in the parallel relationship, and moreover includes a check valve adapted to close said communication hole when the pressure in the atmospheric chamber becomes higher than the atmospheric pressure.
Dependencies are inferred from the claim text.