Low profile horizontal positionable carburetor with self-adjusting double venturi

Claim 1

A low profile carburetor for mounting on an internal combustion engine comprising: a housing, a hollow mixing chamber provided within said housing and having a fuel reservoir means mounted on its top at one end of said housing and a fuel-air outlet means mounted at the bottom of the other end of said housing, the interior of said chamber forming a venturi shaped opening positioned longitudinally of said housing tapering from a minimum diameter at a point along its length toward a greater diameter opening at each end of said chamber, piston means movably mounted in said opening for movement longitudinal thereof, said piston means comprising along at least a part of its length a segment of a cone, whereby movement of said piston means within said opening forms a first venturi between its outer periphery and the inside surface of said opening, a needle valve assembly fixedly mounted on said carburetor and forming a fuel inlet means extending longitudinally thereof through a conical configuration and a metering rod arranged therein, said conical configuration defining a reservoir within its larger end for receiving fuel for movement around said metering rod and through said fuel inlet and out the apex of said conical configuration, said metering rod being adjustably mounted on said carburetor and extending from said reservoir through said fuel inlet means toward said piston, said piston means having a hollow extension for movement around and along the outer periphery of the apex end of said conical configuration, the inside surface of said hollow extension forming with the outside surface of said conical configuration a passageway forming a second venturi, biasing means attached to said carburetor and engaging said piston means for biasing said piston means around the apex of said conical configuration, said metering rod controlling the flow of fuel through said fuel inlet means, and air inlet means connected to said first venturi and said passageway, said air inlet means transmitting air into said passageway for mixing with the fuel ejected from said fuel inlet means and separately into said first venturi for mixing air with the fuel and air mixture from said fuel inlet means over at least a part of the outer periphery of said piston means.