公开(公告)号：US11428326B2

公开(公告)日：2022-08-30

申请号：US17418016

申请日：2019-12-26

Applicant: KITZ CORPORATION

Inventor： Takeshi Gomi

IPC: F16K1/226 ,  F16K25/00

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.

公开(公告)号：US09879790B2

公开(公告)日：2018-01-30

申请号：US14913547

申请日：2014-08-28

Applicant: KITZ CORPORATION

Inventor： Takeshi Gomi ,  Ronald Guenther ,  Osamu Watanabe

IPC: F16K5/06 ,  F16K5/20 ,  H01M8/04082

CPC classification number: F16K5/201 ,  F16K5/0605 ,  F16K5/0626 ,  F16K5/0694 ,  H01M8/04201

Abstract: A high-pressure trunnion ball valve which is particularly suitable for a high-pressure fluid, the high-pressure trunnion ball valve is composed of a ball (10) rotatably provided in a body (3) having a lid member (2), a seat retainer (11) seal-connected to the ball, a spring member (12) applying an elastic force to the seat retainer to a seal side, and a seal member (13) attached to an outer circumferential face of the seat retainer. An upper stem (50) and a lower stem (51) having the same diameter are provided on an upper side and a lower side of the ball in an extending manner, respectively, to constitute a ball member (52), shaft-attaching seal mechanisms (20) having the same structure are attached to the upper and lower stems at symmetrical positions regarding the ball to achieve a balance structure, thereby avoiding thrust loads.

公开(公告)号：US11698137B2

公开(公告)日：2023-07-11

申请号：US17873750

申请日：2022-07-26

Applicant: KITZ CORPORATION

Inventor： Takeshi Gomi

IPC: F16K1/226 ,  F16K25/00 ,  F16K1/22

CPC classification number: F16K1/2261 ,  F16K1/222 ,  F16K25/00

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.