Patent ID: 6406031
Filing Date: 2002-06-18
Classification: F16J,Y10S

Abstract:
A seal for a rotary shaft extending from a container containing agitated abrasive particulates through a wall of the container, the seal comprising:a) a polymeric first washer member having a first side and a second side and sealingly positioned at its first side against the wall of the container and sealingly positioned around the shaft for rotation of the shaft inside the washer member; b) a polymeric second washer member having a first side and a second side and sealingly positioned around the shaft with its first side in contact with the second side of the first member for rotation of the second member with the shaft and for rotation of the first side of the second member relative to the second side of the first member; c) a polymeric compressible foam third washer member having a first side and a second side and sealingly positioned around the shaft with its first side in contact with the second side of the second member for rotation with the shaft and the second member; and, d) a retaining member having a first side and a second side and positioned at least partially around the shaft at its second side in a groove in the shaft with its first side in engagement with the second side of the third member for rotation with the shaft and the third member, the groove being positioned to retain the first member, the second member and the third member in compression between the retaining ring and the wall of the container.