Patent ID: 8128095

Claim:
A mechanical shaft seal comprising a rotary seal ring, a stationary seal seat, a gland and a rotor sleeve for relative rotation, said rotor sleeve having an inner wall, an outer wall, a first distal end and a second distal end, a seal assembly comprising a stationary grease housing, a lip seal connected thereto near said first distal end, and a grease chamber containing grease bounded by at least said lip seal, said rotary seal ring and said stationary grease housing, said rotary seal ring surrounding said rotor sleeve and secured near said first distal end, said stationary grease housing surrounds said rotary seal ring, said stationary seal seat being secured to said gland, said gland surrounding said rotor sleeve, said rotary seal ring surrounding said rotor sleeve, in sealing engagement with said stationary seal seat, and said rotor sleeve having a bore therethrough to enable said rotor sleeve to surround and sealingly engage a shaft for rotation with said shaft.