Apparatus for a disc-stem connection

Details Apparatus for a disc-stem connection Apparatus for a disc-stem connection

1991-01-08

1992-06-30

Fox, John C.

Valves and valve actuation

Rotary valves

Butterfly

251305, F16K 122

Patent

active

051256240

ABSTRACT:
Disc-stem connection for a butterfly valve using interfitted slots on the disc and stem for mechanical connection. An oversize slot on the disc creates channels between the disc and the stem which allows deep penetration of a weld bead. Centralization of the stems within the oversize slots is effected by means of small spacers interposed between the stems and the slot edges. The spacers are small enough so that the necessary space created for the weld is not displaced.

REFERENCES:
patent: 868182 (1907-10-01), Hayden
patent: 3539148 (1970-11-01), Boos, Jr.
patent: 4688594 (1987-08-01), Gardner

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