Abstract A polyamide cap fits tightly over the head of the idling needle and a vane on the cap abuts a boss on the carburetor body to prevent needle rotation in one direction. Internal teeth of the cap fit over the idling needle head to prevent separating the cap from the needle, while lands on the interior of the cap permit easy installation. The cap is installed during carburetor flow testing with the idling needle in the position producing the maximum allowable amount of fuel flow through the idling passages and with the vane contacting a boss on the side preventing further increases in the amount of idling fuel. A decrease in idling fuel can be effected by rotating the cap and needle in the direction moving the vane away from the boss for almost one full turn.
In a device having a body for metering fuel to an internal combustion engine and having a rotatable member for increasing the amount of idling fuel, an idling fuel limiter comprising a head formed on the rotatable member, said head being located just outside the body of said device, and a cap made of a deformable material and movable onto said head, said cap fitting on the head so said cap is nonrotatable relative to the head, said cap containing internal teeth that deform to permit moving the cap over said head, said teeth fitting over said head to prevent integral removal of the cap from the head, said cap having an exterior projecting vane located to prevent rotation of the member in the direction increasing the amount of idling fuel but permitting rotation in the direction decreasing the amount of idling fuel.
Claim 2
Dependent Claim
143 words
In a device having a body for metering fuel to an internal combustion engine and having a rotatable member for increasing the amount of idling fuel, an idling fuel limiter comprising a head formed on the rotatable member, said head being located just outside the body of said device, and a cap made of a deformable material and movable onto said head, said cap fitting on the head so said cap is nonrotatable relative to the head, said cap containing internal teeth that deform to permit moving the cap over said head, said teeth fitting over said head to prevent integral removal of the cap from the head, said cap having an exterior projecting vane located to prevent rotation of the member in the direction increasing the amount of idling fuel but permitting rotation in the direction decreasing the amount of idling fuel.
Claim 3
Dependent Claim
29 words
The device of claim 1 comprising lands formed on the interior of the cap to guide the teeth over the head during installation of the cap on the head.
Claim 4
Dependent Claim
14 words
The device of claim 2 in which the cap is made of a polyamide.