Centrifugal finishing apparatus embodying improved seal and method

Abstract From the Canadian patent

Apparatus for finishing parts or workpieces in the presence of liquid in a finishing chamber having outer upstanding wall and bottom members which are symmetrically arranged about a common axis and relatively rotatable about the axis, for imparting motion to the contents of the chamber for finishing of the parts or workpieces therein, and means for causing the relative motion, having an improved resilient seal between the bottom and the wall members in the form of a resiliently-restricted zone, comprising a partial bottom-forming lip or other partial bottom-forming element, and means for pumping fluid into said zone at a sufficiently pressure so that the fluid enters the zone and thence …