Abrading – Machine – Rotary tool
Patent
1996-09-27
1998-05-12
Rose, Robert A.
Abrading
Machine
Rotary tool
451430, 451557, 451558, B24B 305
Patent
active
057497745
ABSTRACT:
A valve refacing tool comprising a hollow cylindrical column. The column has an upper end and a lower end and has a central bore throughout its entire length. The column has exterior threads at its upper end and an outwardly flared cylindrical support at its lower end. A crown is provided and has a central vertical bore with internal threads removably received by the threads at the upper end of the column. The crown has a lower surface with a radial interior edge adapted to be supported on the upper end of the column. The crown has a plurality of radially extending fins each with an enlarged height at its radially exterior edge and an upper surface at an angle with respect to the vertical. Each upper surface has a dove tail recess. A cylindrical bushing sleeve is positioned within the bore of the column. The bushing sleeve has an upper end located at an intermediate extent of the column and a lower end located beneath the lower end of the column. The bushing sleeve has spaced bushings of a bearing material adapted to receive and rotatably support the cylindrical stem of a valve to be ground. An aperture is formed in an intermediate extent of the column with a securement component positioned in the aperture to contact and position the sleeve with respect to the column. A plurality of grind pads are provided.
REFERENCES:
patent: 3354528 (1967-11-01), Appleby
patent: 4637762 (1987-01-01), Acker
Nguyen George
Rose Robert A.
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