公开(公告)号：US20250067282A1

公开(公告)日：2025-02-27

申请号：US18724700

申请日：2023-01-06

Applicant: NHK Spring Co., Ltd.

Inventor： Naohito Nakano ,  Daijiro Ohta ,  Akira Tsujino ,  Tomoya Kurokawa

IPC: F15B1/16

Abstract: A manufacturing method for manufacturing an exterior body of an accumulator including a bottom, a shell, and a port, includes: press fitting the bottom into the shell; and melting and solidifying a region including a part of a connection portion between the bottom and the shell which has been press fitted.

公开(公告)号：US12018704B2

公开(公告)日：2024-06-25

申请号：US16982250

申请日：2019-03-27

Applicant: NHK SPRING CO., LTD.

Inventor： Hiroshi Mizukami ,  Naohito Nakano ,  Mieko Yanagida

IPC: F15B1/04 ,  B21D22/20 ,  B21D51/24 ,  B23K26/21 ,  F15B1/10 ,  B21D35/00 ,  B21D51/16

CPC classification number: F15B1/04 ,  B21D22/20 ,  B21D51/24 ,  B23K26/21 ,  F15B1/103 ,  F15B1/106 ,  B21D35/006 ,  B21D51/16 ,  F15B2201/3153 ,  F15B2201/405 ,  F15B2201/4056 ,  F15B2201/605

Abstract: A shell member 10 constituting an accumulator 100 including a cover member 30, a shell member 10 having a cylindrical portion 11, an opening portion 13 formed at one end of the cylindrical portion 11 and welded to the cover member 30, and a closed portion 12 formed at another end of the cylindrical portion 11, and an accumulation part 70 accommodated in the shell member 10. The cylindrical portion 11 includes an upper end portion 11a, and a protruding portion 11c having the opening portion 13. The protruding portion 11c is thicker than the upper end portion 11a.

公开(公告)号：US20250146513A1

公开(公告)日：2025-05-08

申请号：US18726139

申请日：2023-01-20

Applicant: NHK SPRING CO., LTD

Inventor： Naohito Nakano ,  Daijiro Ohta ,  Takashi Doi ,  Tomoya Kurokawa

IPC: F15B1/10

Abstract: A cap bellows assembly seals one end of a bellows provided inside an exterior body of an accumulator, the accumulator including a bottom, a shell, and a port, and includes: a cap body configured to cover an opening of the bellows; and a cap elastic portion provided between the cap body and the port and fixed to the cap body. A bonding surface of the cap body, to which the cap elastic portion is bonded, is subjected to a zinc calcium phosphate treatment, and a hopeite amount on the bonding surface is 4.8% or less.