Portable boring and refinishing tool for end-loading ball valves

A tool for selectively boring and refinishing one or more seating surfaces in a valve body of an end-loading ball valve, said tool comprising:

• a base plate adapted to be secured to a planar top surface of a valve body;
• a tool housing secured to said base plate, said tool housing having an essentially cylindrical exterior surface about an axis perpendicular to said base plate, said cylindrical exterior surface having an essentially flat chord-like portion provided thereon, said tool housing further having an interior surface defining an essentially hollow interior, said interior surface being internally counter-threaded to receive an externally threaded member adapted to travel axially therein;
• input drive means;
• a cutter head assembly mounted on said drive means, said cutter head assembly having a tool bit mounted thereon for traversing a circular path about said axis, said cutter head assembly further comprising feed means for causing the radial displacement of said tool bit at a rate related to the circular velocity of said cutter head assembly when said feed means is engaged;
• drive means for transmitting rotary power between said input drive means and said cutter head assembly;
• means for adjusting the axial position of said cutter head assembly, said axial position adjustment means including said externally threaded member adapted to travel axially in said tool housing so that said cutter head assembly may be selectively lowered and raised to position said tool bit against the seating surface;
• a bar member adapted to engage said feed means for causing the radial displacement of said tool bit, said bar member being selectively movable through a continuum of positions along a direction parallel to said axis, said movement of said bar member facilitating the non-engagement of said feed means when radial displacement of said tool bit is not desired and facilitating the engagement of said feed means on said axially translatable cutter head assembly when said radial displacement of said tool bit is desired;
• channel-forming means secured to said essentially flat chord-like portion of said tool housing, said channel-forming means adapted to at least partially define a channel through which said bar member extends;
• and,
• means for selectively locking said bar member in said channel.