Patent ID: 6189425
Filing Date: 2001-02-20
Classification: B23B,Y10T

Abstract:
Portable apparatus for machining pipes, valves, flanges and fittings, comprising in combination:(a) an elongated mandrel having radially adjustable legs proximate one end thereof and adapted to concentrically mount the mandrel to an inside diameter of a tubular workpiece to be machined;(b) an annular housing member concentrically disposed on said mandrel and longitudinally displaceable along the mandrel, said housing member containing a plurality of regularly spaced bearings projecting outwardly from one face proximate an outer periphery thereof;(c) a gear ring concentrically disposed on and journaled for rotation about the mandrel, the gear ring having first and second faces, the first face including an annular groove for receiving said plurality of regularly spaced bearings therein;(d) a first tool slide assembly having a base with a threaded feed screw journaled for rotation therein, the feed screw carrying a threaded feed nut and a tool block slidably mounted on the base and engaged by the feed nut such that rotation of the feed screw displaces the tool block relative to the base, the first tool slide assembly being adjustably mounted to the second face of the gear ring whereby the base is positionable at a desired acute angle to the second face;(e) motor means affixed to the annular housing member for driving the gear ring; and(f) drive means operatively coupled between the gear ring and the feed screw for rotating the feed screw as the gear ring is rotated.