Enquatics, Inc.

Michael E Grunwald

David E Wasmer

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.

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Newton, WI, United States of America

Michael E Grunwald