Shaft sealing assembly having replaceable sealing sleeve

A seal assembly for an elongated, axially rotatable shaft, said seal assembly comprising:

• a tubular sleeve adapted to be disposed about said shaft and rotatable therewith;
• an annular sealing body disposed about said sleeve in a sealing position and supporting a seal which engages the sleeve at a first sealing location thereon;
• and
• a locking device operable to maintain said sealing body in said sealing position,
• said sleeve being selectively movable relative to said shaft and sealing body so as to change said sealing location from said first sealing location to a second, different sealing location.

A blender comprising:

• a tank for receiving one or more materials to be blended and having an apertured tank wall;
• an elongated, axially rotatable shaft extending through said apertured tank wall and into the confines of said tank;
• a seal assembly for said shaft, including
• a tubular sleeve disposed about said shaft and rotatable therewith;
• an annular sealing body disposed about said sleeve in a sealing position and supporting a seal which engages the sleeve at a first sealing location thereon;
• and
• a locking device operable to maintain said sealing body in said sealing position,
• said sleeve being selectively movable relative to said shaft and sealing body so as to change said sealing location from said first sealing location to a second, different sealing location.