Patent ID: 6010576
Filing Date: 2000-01-04
Classification: B08B

Abstract:
An apparatus for cleaning a conduit having unwanted chemical substances deposited on an inner wall comprising:a pinion gear having at least two spokes radiating inwardly from an inner rim of said pinion gear toward a center adapted for mounting thereto the lower ends of at least two blades equally spaced from each other circumferentially,an upper retaining bracket of circular shape adapted for mounting thereto the upper ends of said at least two blades equally spaced from each other circumferentially,said at least two blades when mounted in said pinion gear and said upper retaining bracket each blade having two oppositely facing knife edges such that at least four knife edges are situated in a circumference that is not more than 10 mm smaller than the circumference of an inner wall of said conduit to be cleaned, anda rack for intimately engaging said pinion gear adapted for transforming a linear motion of the rack to a rotational motion of the pinion gear in both clockwise and counterclockwise directions to enable said at least four knife edges to scrape off unwanted chemical substances from said inner wall of said conduit.