US 9,810,280 B2
Damping valve
Shinichi Hagidaira, Gifu (JP)
Assigned to KYB Corporation, Tokyo (JP)
Appl. No. 15/21,731
Filed by KYB Corporation, Tokyo (JP)
PCT Filed Sep. 17, 2014, PCT No. PCT/JP2014/074552
§ 371(c)(1), (2) Date Mar. 14, 2016,
PCT Pub. No. WO2015/041247, PCT Pub. Date Mar. 26, 2015.
Claims priority of application No. 2013-191337 (JP), filed on Sep. 17, 2013.
Prior Publication US 2016/0230832 A1, Aug. 11, 2016
Int. Cl. F16K 31/126 (2006.01); F16F 9/348 (2006.01); F16F 9/34 (2006.01); F16F 9/46 (2006.01); F16F 9/50 (2006.01); F15B 13/043 (2006.01)
CPC F16F 9/348 (2013.01) [F15B 13/0433 (2013.01); F16F 9/34 (2013.01); F16F 9/3481 (2013.01); F16F 9/46 (2013.01); F16F 9/50 (2013.01); F16F 2228/066 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A damping valve, comprising:
a valve seat member that includes a port and a first valve seat, the first valve seat surrounding the port;
a shaft member disposed on the valve seat member;
an annular main valve element mounted movable in an axial direction with respect to the shaft member, the main valve element seating on and separating from the first valve seat, and the main valve element including a second valve seat on an opposite side of the valve seat member;
a sub valve element mounted on the shaft member, the sub valve element seating on and separating from the second valve seat;
a valve-element-between chamber disposed between the main valve element and the sub valve element, and on an inner peripheral side of the second valve seat;
a restrictive passage that causes the port to be communicated with the valve-element-between chamber to provide a resistance to a flow of a passing fluid;
a main valve element biasing part configured to bias the main valve element to the first valve seat; and
a sub valve element biasing part configured to bias the sub valve element to the annular main valve element, wherein
the restrictive passage is formed of a ring-shaped gap between the main valve element and the shaft member.