Method for forming a ball valve connection

Details Method for forming a ball valve connection Method for forming a ball valve connection

1990-02-07

1991-01-15

Briggs, William

Metal working

Method of mechanical manufacture

Valve or choke making

409131, B23P 1302, B23C 328

Patent

active

049843621

ABSTRACT:
A method of manufacturing a ball valve member for cooperation with a valve and a ball valve member includes utilizing a cutting tool having first and second annular cutting surfaces with one of the cutting surfaces having a smaller radius than the other cutting surface whereby a slot is cut in the surface of the ball valve member to a greater depth than heretofore possible for permitting greater penetration of a valve stem into the ball valve member and recess is formed adjacent the slot for the ball valve stem for receiving a lug member mounted on the stem to increase torque transmission to the ball valve element when the operation step is rotated.

REFERENCES:
patent: 2774631 (1956-12-01), Wahlin
patent: 2890017 (1959-06-01), Shafer
patent: 3411746 (1968-11-01), Scaramucci
patent: 4678161 (1987-07-01), Bando et al.

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