Composite v-belt pulley and method

Claim 1

An automotive V-belt pulley construction, comprising, metal hub means with a plurality of mounting holes in a single plane thereof for mounting the pulley for rotation, said metal hub means including, peripheral portion means operative to receive and support a molded plastic sheave means containing a circular V-belt groove operative to receive the belt therein, said plastic sheave means being molded over the peripheral portion means in a fixed relationship therewith, mechanical projection means being present on the peripheral portion means to cause interlocking and to assist in preventing any relative rotation between the plastic sheave and the hub means, said mechanical projection means being shaped to receive and not interfere with the V-belt groove in said plastic sheave, said plastic sheave means being formed of a high temperature resistant, distortion resistant, plastic material which has a belt contacting surface means of relatively high coefficient of friction to resist slippage between the belt and the pulley, said plastic sheave means being made of a material selected from at least one of the group consisting of a fiberglass plastic, a thermoset plastic, or nylon, and wherein said plane of the mounting holes is significantly laterally offset from a circular plane formed by the V-belt groove.

Claim 5

A method of manufacturing a composite pulley construction for use with an automotive V-belt and the like, comprising the steps of: stamping from metal stock a metal hub means which includes mounting means for the pulley, a peripheral portion means for receiving a plastic sheave means, and mechanical projection means, treating the metal hub subsequent to stamping thereof with a material means from the group consisting of paint or a treatment solution to provide the metal with corrosion resistance, injection molding a plastic sheave means over the peripheral portion means in a fixed relationship therewith, said mechanical projection means on the peripheral portion of the hub means being operative to assist in preventing relative rotation between the plastic sheave and the hub means.

Claim 6

A method of manufacturing a composite pulley construction for use with an automotive V-belt and the like, comprising the steps of: stamping from metal stock a metal hub means which includes mounting means for the pulley, a peripheral portion means for receiving a plastic sheave means, and mechanical projection means, treating the metal hub subsequent to stamping thereof with a material means from the group consisting of paint or a treatment solution to provide the metal with corrosion resistance, injection molding a plastic sheave means over the peripheral portion means in a fixed relationship therewith, said mechanical projection means on the peripheral portion of the hub means being operative to assist in preventing relative rotation between the plastic sheave and the hub means.