公开(公告)号：US11940048B2

公开(公告)日：2024-03-26

申请号：US17197067

申请日：2021-03-10

Applicant: MIKUNI CORPORATION

Inventor： Toshiaki Ishii ,  Makoto Koyama ,  Daisuke Takayama

IPC: F16J15/10 ,  F16J15/30 ,  F16J15/54

CPC classification number: F16J15/10 ,  F16J15/30 ,  F16J15/54 ,  F04B2201/0603

Abstract: A valve device includes a body that defines a passage through which a fluid flows, a shaft that is movably supported with respect to the body and defines an axis, a valve element that is fixed to the shaft to open and close the passage; and a cylindrical bearing bush that movably supports the shaft with respect to the body, in which the bearing bush includes a mixed region in which a metal core material and expanded graphite are mixed with each other, and a first expanded graphite region made of only the expanded graphite such that the metal core material is not exposed in an inner circumferential side region in contact with an outer circumferential surface of the shaft.

公开(公告)号：US11448142B2

公开(公告)日：2022-09-20

申请号：US17154674

申请日：2021-01-21

Applicant: MIKUNI CORPORATION

Inventor： Toshiaki Ishii ,  Makoto Koyama ,  Daisuke Takayama ,  Naoki Tanaka

IPC: F02D9/10 ,  F02D9/04 ,  F16K31/04 ,  F16K1/22

Abstract: Provided is an exhaust valve device 1 for a vehicle in which a valve element 7 is supported in an exhaust passage 4 by a rotating shaft 5 axially supported by a valve body 3, a flexible joint member 16 is secured to an output shaft 13a of a motor unit 13 attached to the valve body 3, and a lower end of the flexible joint member 16 and an upper end of the rotating shaft 5 are coupled via a rigid joint member 15, in which the rigid joint member 15 includes: a sealing element 18 having a sealing surface 18a and arm portions 18c, the sealing surface 18a being coupled to one end of the rotating shaft 5 and sealing an axially supported portion of one end of the rotating shaft to prevent exhaust gas from leaking, the arm portions 18c being formed in a periphery of the sealing surface 18a; and a transmission element 19 having a spring groove 19a and engagement grooves 19b, the spring groove 19a being coupled to the end of the flexible joint member 16, the engagement grooves 19b being engaged with the arm portions 18c of the sealing element 18 to restrict relative rotation.

公开(公告)号：US11105274B1

公开(公告)日：2021-08-31

申请号：US17154691

申请日：2021-01-21

Applicant: MIKUNI CORPORATION

Inventor： Toshiaki Ishii ,  Makoto Koyama ,  Daisuke Takayama ,  Naoki Tanaka

IPC: F02D9/08 ,  F02D9/10

Abstract: An exhaust valve device for a vehicle includes: a valve element 7 axially supported by a rotating shaft 5 in a bore 4 of a valve body 3 produced through casting; sealing projections 21 and 22 integrally formed on an inner circumferential surface of the bore 4 to follow one side portion 7a and the other side portion 7b of an outer circumferential edge of the valve element 7 at a fully closed position; sealing surfaces 21a and 22a of the sealing projections 21 and 22, the right side portion 7a and the left side portion 7b of the valve element 7 at the fully closed position abutting respectively on the sealing surfaces; R-shaped corners 21b and 22b formed between the inner circumferential surface of the bore 4 and the sealing surfaces 21a and 22a; and diameter enlarged portions 25 formed in the inner circumferential surface of the bore 4 to enlarge the bore 4 that are adjacent respectively to the sealing surfaces 21a and 22a of the sealing projections 21 and 22 and correspond to lengths of the sealing surfaces 21a and 22a, and the valve element 7 has an outer shape enlarged to correspond to a height of the corners 21b and 22b on an outer circumferential side with formation of the diameter enlarged portions 25 at the fully closed position.