Abstract: A driven seal assembly is provided for a shaft rotated by a motor disposed in a motor housing and having a seal housing adjacent to the motor housing through which the shaft extends. A first rotary seal is frictionally fit on the shaft adjacent the first stationary seal seat. A second rotary seal is frictionally fit on the shaft adjacent a second stationary seal seat. A spring surrounds the shaft and provides bi-directional axial forces on the first and second rotary seals against the first and second stationary seal seats. A positive drive mechanism is mounted on the shaft between the first and second rotary seals in a driving, mating relationship therewith and includes a first driving element in driving engagement with the first rotary seal and a second driving element in driving engagement with the second rotary seal.

Abstract: A driven seal assembly is provided for a shaft rotated by a motor disposed in a motor housing and having a seal housing adjacent to the motor housing through which the shaft extends. A first stationary seal seat is mounted on the shaft and secured in a bore of the seal housing. A first rotary seal is frictionally fit on the shaft adjacent the first stationary seal seat. A second stationary seal seat is mounted on the shaft and is secured in a bore of the motor housing. A second rotary seal is frictionally fit on the shaft adjacent the second stationary seal seat. A spring surrounds the shaft and provides bidirectional axial forces on the first and second rotary seals against the first and second stationary seal seats.