US Patent 10480657 Mechanical pump seal

An improved mechanical seal and repair method can be used with mechanical pump seal assemblies. The improved seal utilizes rotating and non-rotating sections of improved configuration, each of which can form a seal using a standard size carbon-face O-ring. The rotating section includes an upper seal member and a lower drive member, the upper seal member being made of a first material and the lower drive member being made of a second material, the upper seal member and the lower drive member being connected such that movement of the lower drive member causes movement (rotation) of the upper seal member. The mechanical seal can be in the form of replacement parts that replace the old parts without modifications to the overall seal and assembly.