Butterfly valve

Details Butterfly valve Butterfly valve

2005-08-16

2005-08-16

Douglas, Steven O. (Department: 3751)

Valves and valve actuation

Rotary valves

Butterfly

Reexamination Certificate

active

06929243

ABSTRACT:
The butterfly valve comprises a disk which is provide with at least one protuberance over at least a portion of at least one of its faces. Quite unexpectedly, the use of such a disk makes it possible to improve considerably the quality of the cleaning of the valve and to reduce the time required for cleaning operations.

REFERENCES:
patent: 2095263 (1937-10-01), Moss
patent: 3485476 (1969-12-01), Hemphill
patent: 3945398 (1976-03-01), Masheder
patent: 5102097 (1992-04-01), Davis et al.
patent: 5465756 (1995-11-01), Royalty et al.
patent: 6047950 (2000-04-01), Pontoppidan et al.

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