Title:
COIL SPRING, SUSPENSION DEVICE, AND METHOD FOR PRODUCING COIL SPRING
Document Type and Number:
WIPO Patent Application WO/2023/276913
Kind Code:
A1
Abstract:
A coil spring according to one embodiment of the present invention is formed of an element wire that is helically wound, and has end turn sections and an effective section. The surface of the element wire in each end turn section has a region that is softer than the surface of the element wire in the effective section.
Inventors:
OKADA HIDEKI (JP)
YAMAUCHI YUICHIRO (JP)
TANAKA RYO (JP)
SUZUKI TAKESHI (JP)
SHIBAIRI KOSUKE (JP)
YAMAUCHI YUICHIRO (JP)
TANAKA RYO (JP)
SUZUKI TAKESHI (JP)
SHIBAIRI KOSUKE (JP)
Application Number:
PCT/JP2022/025447
Publication Date:
January 05, 2023
Filing Date:
June 27, 2022
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
B21F35/00; B60G3/28; C21D1/34; C21D1/40; C21D7/06; C21D9/02; F16F1/02; F16F1/06; F16F1/12
Domestic Patent References:
| WO2013099821A1 | 2013-07-04 | |||
| WO2020026716A1 | 2020-02-06 |
Foreign References:
| JP2019124363A | 2019-07-25 | |||
| JPH09264360A | 1997-10-07 | |||
| JP2014122652A | 2014-07-03 | |||
| JP2000283201A | 2000-10-13 | |||
| JP6587993B2 | 2019-10-09 | |||
| JP2019007081A | 2019-01-17 | |||
| JP2010133558A | 2010-06-17 | |||
| JP6587993B2 | 2019-10-09 | |||
| JP2019007081A | 2019-01-17 | |||
| JP2010133558A | 2010-06-17 |
Attorney, Agent or Firm:
S & S INTERNATIONAL PPC (JP)
Download PDF:
Previous Patent: BIASING FORCE GENERATION DEVICE AND MOVEMENT ASSISTANCE DEVICE
Next Patent: KNOCK-TYPE WRITING INSTRUMENT
Next Patent: KNOCK-TYPE WRITING INSTRUMENT