Butterfly valve method and apparatus

Details Butterfly valve method and apparatus Butterfly valve method and apparatus

1990-06-06

1991-07-09

Nilson, Robert G.

Fluid handling

Processes

251215, 251228, 251248, 251283, 251308, F16K 122

Patent

active

050295993

ABSTRACT:
a balanced butterfly valve method and apparatus having a valve plate pivotally supported within a mounting body. The valve plate is capable of both rotational and translational movement in response to rotation of an input shaft. A spring is provided to resist translational movement of the valve plate. Differential gearing is used to convert rotational movement of the input shaft into rotational and translational movement of the valve plate depending on the relationship between the force exerted by the spring and the torque exerted on the valve plate by the fluid.

REFERENCES:
patent: 2910266 (1959-10-01), Condello
patent: 3065950 (1962-11-01), Goldberg
patent: 4093180 (1978-06-01), Strabala
patent: 4840349 (1989-06-01), Peter

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