Butterfly valve

Details Butterfly valve Butterfly valve

1984-05-29

1986-11-11

Chambers, A. Michael

Valves and valve actuation

Rotary valves

Butterfly

137315, 291571R, F16K 122

Patent

active

046217908

ABSTRACT:
A butterfly valve having a body provided with a fluid passage therethrough. The fluid passage includes a tapered inner surface. A circular valve member is in the housing across the passage and is secured to a shaft rotatable on the housing. One end of the shaft is in a portion of an annular groove in the tapered inner surface, and the other end of the shaft is rotatably mounted in a radial hole by a bearing and projects outwardly from the housing. A knob is on the outer end of the shaft for manual rotation of the shaft. The groove is formed in the body by turning the body on a lathe, thereby requiring only a single hole to be drilled in the body, namely, the hole for receiving the bearing and the adjacent portion of the shaft. Provision of the annular groove eliminates the need for drilling a pair of radial holes on opposite sides of the passage, thereby avoiding misalignment of the shaft.

REFERENCES:
patent: 3143333 (1964-08-01), Lift
patent: 3862740 (1975-01-01), Gallagher et al.
patent: 3918264 (1975-11-01), Bradshaw
patent: 4146048 (1979-03-01), McCabe
patent: 4213477 (1980-07-01), Velasquez

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