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US 11,698,137 B2Granted
Centric butterfly valve
AssigneeKitz Corporation
InventorTakeshi Gomi
Life of this patent
Estimating the term…
Abstract
A centric butterfly valve (1) in which top and bottom boss surfaces (19, 29) are formed to be spherical, an outer peripheral end of the blade portion of the valve disk (24) is formed to be an M-shaped section part (29) with round-shaped apex parts (27) and a round-shaped valley part (28) smoothly linked, and the centric butterfly valve has a valve disk (3) having an extended part (41) obtained by successively and slightly extending the spherical surface of each of the top and bottom boss surfaces (19, 20) to a blade portion (40) side.
Claims4
A valve disk for a centric butterfly valve, the valve disk comprising:
- a blade portion;
- a top boss surface provided on an upper part of the blade portion;
- a bottom boss surface provided on a lower part of the blade portion;
- and
- an outer peripheral seal part provided at an outer peripheral end of the blade portion,
- wherein the outer peripheral seal part is an M-shaped section part defined by round shaped apex parts and a round-shaped valley-bottom part that smoothly transitions into the round shaped apex parts,
- the top boss surface is formed by a partial top spherical surface, and a top extended part is obtained by continuously extending the partial top spherical surface to the apex parts, and
- the bottom boss surface is formed by a partial bottom spherical surface, and a bottom extended part is obtained by continuously extending the partial bottom spherical surface to the round shaped apex parts.
5 more elements
Dependencies are inferred from the claim text.