US 11,655,875 B2
Damping valve and shock absorber
Yoshifumi Kobayashi, Aichi (JP); Tomoyasu Abe, Aichi (JP); and Yuusuke Furuta, Gifu (JP)
Assigned to KYB CORPORATION, Tokyo (JP)
Appl. No. 16/968,074
Filed by KYB Corporation, Tokyo (JP)
PCT Filed Feb. 12, 2019, PCT No. PCT/JP2019/004842
§ 371(c)(1), (2) Date Aug. 6, 2020,
PCT Pub. No. WO2019/163579, PCT Pub. Date Aug. 29, 2019.
Claims priority of application No. JP2018-028777 (JP), filed on Feb. 21, 2018.
Prior Publication US 2021/0025471 A1, Jan. 28, 2021
Int. Cl. F16F 9/34 (2006.01); F16F 9/18 (2006.01); B60G 13/08 (2006.01); B60G 17/08 (2006.01); F16F 9/348 (2006.01); F16F 9/516 (2006.01); F16K 15/14 (2006.01); F16K 27/02 (2006.01)
CPC F16F 9/348 (2013.01) [F16F 9/185 (2013.01); F16F 9/3488 (2013.01); F16F 9/516 (2013.01); F16K 15/148 (2013.01); F16K 27/0209 (2013.01); B60G 13/08 (2013.01); B60G 17/08 (2013.01); B60G 2202/24 (2013.01); B60G 2206/41 (2013.01); B60G 2500/11 (2013.01); B60G 2600/21 (2013.01); B60G 2800/162 (2013.01); F16F 9/187 (2013.01); F16F 2222/12 (2013.01); F16F 2228/066 (2013.01); F16F 2232/08 (2013.01); F16F 2234/02 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A damping valve comprising:
a valve seat member having a port, an annular window communicated with an outlet end of the port, an inner circumference valve seat provided on an inner circumferential side of the annular window, and an outer circumference valve seat of the annular window;
a first valve element formed to have an annular shape and stacked on the valve seat member, the first valve element being configured to open and close the annular window by being seated on and separated from the outer circumference valve seat, and the first valve element having a hole facing the annular window and forming a throttle or a passage in communication with a throttle;
a second valve element formed to have an annular shape and provided between the inner circumference valve seat of the valve seat member and the first valve element, the second valve element being configured to open and close the hole; and
a biasing member configured to bias the first valve element towards the second valve element, wherein
a surface of the second valve element on an opposite side from the valve seat member is higher than the outer circumference valve seat of the valve seat member when viewed from a direction orthogonal to an axial direction of the valve seat member, and
the first valve element is configured to be seated on the outer circumference valve seat by being subjected to a biasing force of the biasing member.