Patent ID: 6536316
Filing Date: 2003-03-25
Classification: B23B,Y10T

Abstract:
A portable pipe machining tool comprising:a pipe attachment unit; a drive unit; a feed unit; and a cutting unit, wherein said cutting unit attaches to the drive unit, and said drive unit attaches to the feed unit, and said feed unit fixedly mounts onto the pipe attachment unit, and said pipe attachment unit frictionally attaches to an inside surface of a pipe such that said feed unit advances said drive unit and said cutting unit along the longitudinal axis ofâ€”the pipe attachment unit, wherein said pipe attachment unit further comprises: a mandrel with a first end, a second end, a longitudinal bore and at least three mandrel gibs thereon; and a radially expandable chuck attached to the first end of said mandrel by a quick release mechanical coupling, wherein said feed unit comprises: a nut core; a nut barrel; a torque plate; and at least one feed handle, wherein said nut core is positionally locked to said nut barrel by said feed handle and is clockwise threadably engaged with the longitudinal bore of said mandrel, and said nut barrel is counter clockwise threadably engaged with said torque plate, and said torque plate is connected to said drive unit, such that clockwise rotation of said feed handle slidingly advances said drive unit and said cutting unit along the mandrel gibs by pulling the nut core into the longitudinal bore of the mandrel and simultaneously pushing the torque plate away from the nut barrel.