US 12,297,913 B2
Fluid control valve
Toshinori Kanzaki, Tokyo (JP); Wataru Takahashi, Tokyo (JP); Masahiro Hayama, Tokyo (JP); Kohei Fukudome, Tokyo (JP); and Keigo Shirafuji, Tokyo (JP)
Assigned to EAGLE INDUSTRY CO., LTD., Tokyo (JP)
Appl. No. 18/019,066
Filed by EAGLE INDUSTRY CO., LTD., Tokyo (JP)
PCT Filed Jul. 27, 2021, PCT No. PCT/JP2021/027767
§ 371(c)(1), (2) Date Jan. 31, 2023,
PCT Pub. No. WO2022/030312, PCT Pub. Date Feb. 10, 2022.
Claims priority of application No. 2020-132385 (JP), filed on Aug. 4, 2020.
Prior Publication US 2023/0296178 A1, Sep. 21, 2023
Int. Cl. F16K 1/42 (2006.01); F16K 1/36 (2006.01)
CPC F16K 1/42 (2013.01) [F16K 1/36 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A fluid control valve, comprising:
a valve housing provided with an inlet port and an outlet port;
a valve body configured to be driven by a drive source;
a spring configured to urge the valve body in a direction opposite a direction of driving by the drive source; and
a valve seat formed at an edge of a through-flow passage the valve body and the valve seat cooperatively forming a poppet valve, the valve being configured to control a flow rate in accordance with a movement of the valve body,
wherein a flow passage on a downstream side of the poppet valve is provided with an increase region where a flow passage cross-sectional area tends to increase toward the downstream side,
the valve body has a surface portion which partially defines the flow passage of the increase region,
the curved shape portion is brought into contact with and separated from the valve seat,
the valve seat is formed in a valve seat member that is formed separately from the valve housing,
the valve seat member is inserted into a recess portion of the valve housing in a valve opening direction of the valve body and press-fitted to the valve housing, and
the valve body has an axial end surface which is configured to come into contact with the valve seat and formed by a curved surface bulged out toward the flow passage without having a recess portion, and an outer peripheral surface directly connected to the axial end surface to extend in an axial direction and partially forming the surface portion.