Coil spring
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Nov 15, 2022
Grant Date -
Jun 24, 2021
app pub date -
Apr 24, 2019
filing date -
May 16, 2018
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A coil spring of this invention includes a first end coil part with a first bearing surface facing to the first side in the axial direction, a second end coil part with a second bearing surface facing to the second side in the axial direction and a central coil part connecting the first and second end coil parts. A displacement length in the axial direction from the outer end portion until the inner end portion of the first end coil part is a thickness of a spring wire forming the coil spring so that a space between the outer end portion of the first end coil part and an inner end portion of the central coil part is zero, and a displacement length in the axial direction between the outer end portion of the first end coil part and a point away along the circumferential direction from the outer end portion toward the inner end portion of the first end coil part by a half of turn around the axial line is less than a half of the thickness of the spring wire.
First Claim
Other Claims data not available
Family
International Classification(s)
- 2019 Application Filing Year
- F16F Class
- 903 Applications Filed
- 605 Patents Issued To-Date
- 67 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 0 Citation Count
- F16F Class
- 0 % this patent is cited more than
- 3 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 3.5 Year Payment | $1600.00 | $800.00 | $400.00 | May 15, 2026 |
| 7.5 Year Payment | $3600.00 | $1800.00 | $900.00 | May 15, 2030 |
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | May 15, 2034 |
