公开(公告)号：US20240175533A1

公开(公告)日：2024-05-30

申请号：US18280591

申请日：2022-03-01

Applicant: NHK SPRING Co., Ltd.

Inventor： Yoshio YAMADA ,  Norihiro TAJIMA ,  Shuji TAKAHASHI ,  Atsushi YONEOKA

IPC: F16L55/05

CPC classification number: F16L55/05

Abstract: A pulsation damping member includes a first metal plate and a second metal plate, a crest portion of the second metal plate enters inside a crest portion of the first metal plate, a valley portion of the first metal plate enters inside a valley portion of the second metal plate, a size in the axial direction of an outer end portion of an expansion/contraction space positioned on an outermost side in a radial direction and continuous with joint parts increases toward an inner side in the radial direction, and a first constricted portion having a smallest size in the axial direction in a portion of the expansion/contraction space positioned on an inner side with respect to the outer end portion in the radial direction is positioned on a radially outward side from a center portion between the central axis and the joint parts in the radial direction.

公开(公告)号：US20210003185A1

公开(公告)日：2021-01-07

申请号：US16967252

申请日：2019-02-22

Applicant: NHK SPRING Co., Ltd.

Inventor： Hideaki SAKAI ,  Atsushi YONEOKA

IPC: F16F1/32 ,  F16F1/02

Abstract: A wave spring includes an annular body in which crests and valleys are alternately and continuously formed in a circumferential direction. At least a portion of the annular body in the circumferential direction is a joined portion. The joined portion of the annular body is a flat portion extending in a plane orthogonal to a center axis of the annular body.