Title:
COIL SPRING
Document Type and Number:
WIPO Patent Application WO/2023/181884
Kind Code:
A1
Abstract:
A coil spring (1) has a wire (2) and an elastic coating (60) provided on the wire (2). The coil spring (1) includes a coil portion (33) comprising a plurality of winding portions. The wire (2) has a circular cross-sectional portion (30), a cross-sectional change portion (32), and a square cross-sectional portion (31) in the longitudinal direction of the wire (2). A cross section (S2) of the square cross-sectional portion (31) is nearly square and has a first plane (41a) and a second plane (42a). The first plane (41a) and the second plane (42a) face each other in the coil portion (33). The elastic coating (60) is provided on the first plane (41a) and/or the second plane (42a). The elastic coating (60) is continuous from the circular cross-sectional portion (30) to the cross-sectional change portion (32) and the square cross-sectional portion (31).
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Inventors:
NISHIZAWA SHINICHI (US)
IBANO DAISUKE (JP)
MATSUDA TSUYOSHI (JP)
ARISAKA NORIFUMI (JP)
MURAMATSU SHUN (JP)
ITO CHIHIRO (JP)
SUZUKI TAKUTO (JP)
KINOSHITA MASATAKE (JP)
KAWASAKI ASUKA (JP)
IBANO DAISUKE (JP)
MATSUDA TSUYOSHI (JP)
ARISAKA NORIFUMI (JP)
MURAMATSU SHUN (JP)
ITO CHIHIRO (JP)
SUZUKI TAKUTO (JP)
KINOSHITA MASATAKE (JP)
KAWASAKI ASUKA (JP)
Application Number:
PCT/JP2023/008340
Publication Date:
September 28, 2023
Filing Date:
March 06, 2023
Export Citation:
Assignee:
NHK SPRING CO LTD (JP)
International Classes:
F16F1/06; F16F1/08; F16F1/12
Foreign References:
| JPS52131556U | 1977-10-06 | |||
| JPS5534520U | 1980-03-05 | |||
| JPS62155342A | 1987-07-10 | |||
| JPS5855372B2 | 1983-12-09 | |||
| JP2003206968A | 2003-07-25 |
Attorney, Agent or Firm:
S & S INTERNATIONAL PPC (JP)
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