US 12,338,906 B2
Valve device
Atsushi Tanaka, Kariya (JP); and Ryo Sano, Kariya (JP)
Assigned to DENSO CORPORATION, Kariya (JP)
Filed by DENSO CORPORATION, Kariya (JP)
Filed on Sep. 18, 2023, as Appl. No. 18/469,004.
Application 18/469,004 is a continuation of application No. PCT/JP2022/015523, filed on Mar. 29, 2022.
Claims priority of application No. 2021-071793 (JP), filed on Apr. 21, 2021.
Prior Publication US 2024/0003431 A1, Jan. 4, 2024
Int. Cl. F16K 3/08 (2006.01); F16K 31/04 (2006.01)
CPC F16K 3/08 (2013.01) [F16K 31/04 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A valve device comprising:
a housing that forms a fluid passage at an inside of the housing, wherein the fluid passage is configured to conduct a fluid through the fluid passage;
a passage forming portion that is fixed at the inside of the housing and has at least one passage hole which is configured to conduct the fluid through the at least one passage hole;
a drive device that is configured to output a rotational force;
a shaft that is configured to be rotated about a central axis, which is predetermined, by the rotational force; and
a rotor that is configured to increase or decrease an opening degree of the at least one passage hole in response to rotation of the shaft; and
a torsion spring that surrounds the central axis and is configured to urge the shaft relative to the housing in a circumferential direction of the central axis of the shaft, wherein:
the housing has a stopper that is configured to contact the shaft and thereby limit a rotational drive range of the shaft when the shaft is rotated to a predetermined position; and
the stopper is placed at an inside of the torsion spring.