Patent ID: 9456682
Filing Date: 2016-10-04
CPC Classification: A46B,B08B

Claim Text:
1. A rotational brush apparatus arranged for driven operation by a hand drill, the apparatus comprising: an electrically non-conductive tubular housing having opposing first and second ends spaced apart in a longitudinal direction and a hollow interior space spanning between said first and second ends and bound by a circumferential wall; a metal input shaft lying in the longitudinal direction and reaching into the hollow interior space of the tubular housing from the first end thereof to place an internal end of said metal input shaft inside the tubular housing, while leaving an external end of the metal input shaft exposed outside the tubular housing beyond the first end thereof for engagement in a chuck of the hand drill, the metal input shaft shaft being rotatably supported within the tubular housing; a brush comprising a central core lying parallel to, and in alignment with, the metal input shaft, with bristles of the brush radiating outwardly from said central core at locations outside the tubular housing beyond the second end thereof; a connection between the metal input shaft and the central core of the brush to cause rotation of the brush with the metal input shaft under driven rotation thereof by the hand drill, the connection being disposed at least partially within the interior space of the tubular housing and comprising an electrical insulator that electrically isolates the metal input shaft from the brush and from any metal portion of the connection that lies externally of the tubular housing beyond the second end thereof.