Drill-operated abrading tool

Abstract

A portable abrading tool useful in automobile body work, and the like, embodies a hollow expandable cylinder which is adapted to receive an expandable and disposable cylindrical abrading sleeve and be driven by and secured to an electric hand drill. A unique structure for expanding and contracting the driven cylinder facilitates quick replacement of the abrading sleeve.

I claim: 
     
       1. A portable abrading tool adapted to be removably secured to a hand electric drill of the type having a front housing, a chuck supported on the face of said housing, and a threaded aperture thereon for receiving a threaded fastener, said tool comprising, in combination: a. a hollow elongated cylinder member having at least one slit in the wall thereof and extending for a major portion of the length thereof, having bearing surfaces within said cylinder member intermediate the length thereof and at oppositely disposed positions substantially radially removed from said slit, said bearing surfaces being adapted to receive a camming pressure for expanding said cylinder member, said cylinder member being open at one driven end and being closed at the opposite end by a wall having a central aperture;   b. a drive shaft centrally positioned within said cylinder member and extending from a driven end proximate said cylinder member open end to and through said cylinder member closed end and providing externally of said cylinder member closed end a handle mounting extension portion;   c. a bearing mounted on said drive shaft handle portion and having pivotally connected thereto an auxiliary handle and locking means secured to said drive shaft for retaining said handle bearing on said shaft;   d. a locking sleeve secured to said drive shaft internally of said cylinder member and proximate said end wall;   e. camming means secured to said drive shaft and disposed between said bearing surfaces, said camming means when rotated with respect to said bearing surfaces being operable in a first rotative position to contact said bearing surfaces and expand said cylinder member to tighten any abrading sleeve positioned thereon and in a second rotative position being movable out of contact with said bearing surfaces to allow said cylinder member to contract and said abrading sleeve to be removed;   f. a support bearing mounted internally of said cylinder member outwardly from said camming means and proximate said shaft driven end;   g. a bracket comprising a bent arm member having one end secured to said support bearing and the opposite end secured to a said drill housing by threaded fastener means mating with a said threaded fastening aperture on said housing;   h. a universal coupling means having at one end, a socket connection secured to said drive shaft driven end and at the opposite end to a spindle secured to a said drill chuck; and   i. an abrading sleeve having an appropriate length and internal diameter fitted on said cylinder member and adapted to be tightened thereon by rotation of said camming means against said bearing surfaces to said first rotative position and to be loosened for replacement by rotation of said camming means to said second rotative position. .Iadd. 2. A portable abrading tool adapted to be removably secured to a hand electric drill of the type having a front housing, a chuck supported on the face of said housing, said tool comprising, in combination:   a. a hollow elongated cylinder member having at least one slit in the wall thereof and extending for a major portion of the length thereof, having bearing surfaces within said cylinder member intermediate the length thereof and at oppositely disposed positions substantially radially removed from said slit, said bearing surfaces being adapted to receive a camming pressure for expanding said cylinder member, said cylinder member being open at one driven end and being closed at the opposite end by a wall having a central aperture;   b. a drive shaft centrally positioned within said cylinder member and extending from a driven end proximate said cylinder member open end to and through said cylinder member closed end and providing externally of said cylinder member closed end a handle mounting extension portion, said driven end being secured to a said drill chuck;   c. a bearing mounted on said drive shaft handle portion and having connected thereto an auxiliary handle and locking means secured to said drive shaft for retaining said handle bearing on said shaft;   d. camming means secured to said drive shaft and disposed between said bearing surfaces, said camming means when rotated with respect to said bearing surfaces being operable in a first rotative position to contact said bearing surfaces and expand said cylinder member to tighten any abrading sleeve positioned thereon and in a second rotative position being movable out of contact with said bearing surfaces to allow said cylinder member to contract and said abrading sleeve to be removed;   e. a support bearing mounted internally of said cylinder member outwardly from said camming means and proximate said shaft driven end; and   f. an abrading sleeve having an appropriate length and internal diameter fitted on said cylinder member and adapted to be tightened thereon by rotation of said caming means against said bearing surfaces to said first rotative position and to be loosened for replacement by rotation of said camming means to said second rotative position. .Iaddend.