Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Frictionally engaging sides of opening in work
Patent
1986-03-10
1987-11-24
Goldberg, Howard N.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Frictionally engaging sides of opening in work
291573A, 2940206, 2940208, 407 54, B23B 4100
Patent
active
047085410
ABSTRACT:
A tool and method for repairing valve seats of hydraulic jacks. The valve seat cutting tool is a cylindrical shank of hardened steel with a beveled cutting face at its lower end, the upper end being suitable for engagement by a conventional drilling mechanism. The beveled cutting face, although lying in a single surface, has a forward cutting face beveled back to front at a 17 degree angle and a side cutting face beveled at a 5 degree angle increasing from left to right. The cutting faces are cut at right angles to one another. The size of tool is geared to the diameter of the valve chamber and the ball to be seated. The diameter of the tool, selected from a series of 18 of the same configuration, is slightly less than the diameter of the valve chamber and of the ball to be seated. The tool is centered by the existing recess in which the ball rests. The tool is inserted in the valve chamber and is rotated a few revolutions to square off the walls and bottom surface of the old valve seat. The new valve seat is formed by lightly tapping the top of the replacement ball to be seated with a rod struck by a hammer or other appropriate means.
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Golabi Irene Graves
Goldberg Howard N.
Ouzts Wilbert
Reynolds Benoni O.
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