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Friction reducing bearing

Image Number 4 for United States Patent #3963284.

A method and apparatus for reducing the friction in a ball-bearing pivot axis assembly. Within the bearing assembly, the balls are floated in a fluid lubricant and, especially in fully-floated units, the weight of the balls is an overriding consideration in the generation of sliding frictional torques. In the present invention these gravitational effects are counteracted by matching as nearly as possible the ball density and the flotation fluid density, the floated weight decrease serving to bring down the friction proportionally with an ultimate theoretical complete reduction of frictional uncertainty from that of known systems.

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