US 11,703,136 B2
Control valve
Tetsuya Mimura, Kiryu (JP); and Akifumi Ozeki, Kiryu (JP)
Assigned to YAMADA MANUFACTURING CO., LTD., Kiryu (JP)
Filed by YAMADA MANUFACTURING CO., LTD., Kiryu (JP)
Filed on Feb. 22, 2022, as Appl. No. 17/677,351.
Claims priority of application No. 2021-047369 (JP), filed on Mar. 22, 2021; and application No. 2021-199313 (JP), filed on Dec. 8, 2021.
Prior Publication US 2022/0298957 A1, Sep. 22, 2022
Int. Cl. F16K 11/085 (2006.01); F16K 5/20 (2006.01); F16K 11/087 (2006.01); F01P 7/14 (2006.01); F16K 11/06 (2006.01)
CPC F16K 11/0856 (2013.01) [F16K 5/205 (2013.01); F16K 11/087 (2013.01); F01P 2007/146 (2013.01); F16K 11/06 (2013.01)] 4 Claims
OG exemplary drawing
 
3. A control valve comprising:
a casing in which an outlet for a liquid is formed and the liquid is accommodated;
a rotor having a communication port communicatable with the outlet and rotatably accommodated in the casing; and
a sliding ring having a sliding surface sliding on an outer surface of the rotor in a state of being disposed in the outlet and causing the outlet and the communication port to communicate with each other according to a rotation position of the rotor,
wherein
a liquid holding portion for holding the liquid between the sliding surface and the liquid holding portion is provided on the outer surface of the rotor,
the liquid holding portion has a recessed portion for accommodating the liquid, and
when a surface roughness of the outer surface is defined as a rotor surface roughness and a surface roughness of the sliding surface is defined as a ring surface roughness, the rotor surface roughness is larger than the ring surface roughness.