Diaphragm-type carburetor
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United States of America Patent
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N/A
Issued Date -
Nov 25, 2004
app pub date -
Jun 16, 2004
filing date -
Mar 8, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention facilitates increased output, decreased size, and simplified design and manufacture for a carburetor system in which a metering pin, which moves on a throttle valve, controls the fuel flow rate for a single fuel system. A carburetor of the present invention comprises a butterfly-like throttle valve on an air intake pathway with a nearly uniform diameter along its entire length, and a fuel nozzle positioned on the downstream side thereof. A metering pin retained by an actuating member that reciprocates linearly and remains in constant contact with a cam face of a cam member located on a valve stem. Fuel supplied to the air intake pathway from a constant fuel chamber via the fuel nozzle is controlled according to the opening and closing of a throttle. The metering pin by means of a cam controls the volume of the fuel flow rate at a desired stroke set irrespective of the opening and closing movement of the throttle valve.
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