US 12,085,180 B2
Relief valve and pump cover
Hiroki Saito, Gunma (JP); Yusuke Fujita, Gunma (JP); Hiroshi Ooka, Gunma (JP); and Masahiko Tsuchida, Gunma (JP)
Assigned to MITSUBA Corporation, Gunma (JP)
Appl. No. 18/010,210
Filed by MITSUBA Corporation, Gunma (JP)
PCT Filed Dec. 16, 2021, PCT No. PCT/JP2021/046413
§ 371(c)(1), (2) Date Dec. 14, 2022,
PCT Pub. No. WO2022/158182, PCT Pub. Date Jul. 28, 2022.
Claims priority of application No. 2021-008844 (JP), filed on Jan. 22, 2021.
Prior Publication US 2023/0296184 A1, Sep. 21, 2023
Int. Cl. F16K 7/00 (2006.01); F16K 17/04 (2006.01); F16K 27/02 (2006.01); F04C 14/24 (2006.01)
CPC F16K 17/04 (2013.01) [F16K 27/0209 (2013.01); F04C 14/24 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A relief valve, switching between whether to discharge oil through movement of a valve body, the relief valve comprising:
a first spacing part, in which the valve body moves;
a second space part, connected with the first space part and having a diameter smaller than a diameter of the first space part;
an elastic body, connected with the valve body;
a seal part, disposed in a circumferential direction of the valve body; and
a third space part, formed in the first space part,
wherein the first space part and the second space part are connected at a first end of the first space part, and
the seal part is disposed at a position that is a side surface with respect to a first surface formed on a side of the first end, among surfaces which the valve body has, in a vertical direction with respect to a direction in which the valve body moves reciprocally, and extends from the third space part to a boundary between the first space part and the second part.