Patent ID: 6044512
Filing Date: 2000-04-04
Classification: B24D

Abstract:
A rotary buffing device for applying a finishing compound to and removing blemishes from a painted surface comprising:an open cell polyurethane foam pad including a compressible body having a center axis of rotation, a circular working face and an outer opposite flat mounting face;a single continuous outer peripheral first contact surface of the pad on a portion of the working face, said first contact surface defining a planar annular band of continuous working contact, said band having an inner radial edge and enclosing a remaining portion of the working face when the pad body is generally uncompressed; andan inner second contact surface on said remaining portion of the working face extending from a radial outer edge defined by the inner radial edge and in the plane of said planar annular band radially inwardly toward the axis of rotation of the pad, said second contact surface having a continuous and gradually tapering concave shape with a maximum depth in the range of at least 1/4 inch to about 3/4 inch, said second contact surface providing continuous and uniformly increasing working contact radially inwardly from said first contact surface in response to increasing working load applied in the direction of the axis of rotation and resulting compression of said pad, said second contact surface acting to permit radial outward dispersion of the finishing compound by centrifugal force over said second contact surface toward said first contact surface and to prevent radially outward splatter of the compound beyond said outer peripheral first contact surface.