B - Operations – Transporting – 23 – B
Patent
B - Operations, Transporting
23
B
51/111
B23B 3/26 (2006.01) B23B 29/034 (2006.01) B23C 3/05 (2006.01) B23Q 9/00 (2006.01) B24B 15/00 (2006.01) B24B 15/02 (2006.01)
Patent
CA 1057059
PORTABLE FIELD MACHINE FOR CUTTING, GRINDING AND LAPPING VALVE SEATS Abstract of the Disclosure A portable field machine for cutting, grinding and lapping the valve seat of a valve body having a valve disc axially translatable in a cylindrical valve chamber with respect to the seat includes a pair of axially spaced spiders having radially extendable arms engageable with the walls of the cylindrical valve chamber on opposed sides of the valve seat, the spiders being interconnected by a rigid shaft which is thereby coaxially positioned with the chamber axis and a tool holder adapted to selectively hold either cutting, grinding or lapping tools is rotatably and reciprocably supported on the shaft for axial movement therealong and rotation thereabout with respect to the valve seat, the tool holder rotatably supporting a carrier which is fixed against relative rotation and which is connected to a drive means for operatively rotating the tool means and tool holder concentrically with respect to the axis and the valve seat to perform profile forming operations thereon, the tool holder including feed means for radially and axially translating the tool position to achieve the desired special relationships with the valve seat.
278236
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