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Mechanical aerator










Image Number 3 for United States Patent #4123482.

A mechanical aerator comprising a boss, and at least one blade which extends radially from the boss and comprises a planar body portion and a deflector, the arrangement being such that when the aerator is mounted for rotation about a vertical axis the planar body portion of the blade lies in a vertical, or substantially vertical, plane and the deflector is inclined circumferentially upwardly from the top of the planar body portion.








 
 
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