Self-relieving choke adjustment apparatus

Abstract

A self-relieving choke adjustment apparatus for an internal combustion engine carburetor including a choke valve body and a choke mixing passage formed in the valve body. A choke plate is supported in the mixing passage for pivotal motion about a parallel choke plate axis between an open position and a closed position, such that airflow through the mixing passage tends to rotate the choke plate toward the open position. A rotary biasing element is connected between the choke plate and the choke body and applies a torque biasing the choke plate toward its closed position. The apparatus also includes a choke adjustment lever supported for pivotal motion relative to the choke plate about the choke plate axis and rotationally engaging the biasing element such that lever rotation against the biasing force of the biasing element causes the biasing torque applied to the choke plate by the biasing element to increase thus increasing the amount of airflow required to rotate the choke plate out of its closed position and decreasing the number of degrees the choke plate will be forced open by a given amount of airflow through the mixing chamber.

Dependencies are inferred from the claim text.