The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2019
Filed:
Oct. 27, 2015
Nhk Spring Co., Ltd., Yokohama-shi, Kanagawa, JP;
Kenji Yamamotoya, Manesar, IN;
Hideto Enomoto, Yokohama, JP;
Ken Takahashi, Yokohama, JP;
Toshiaki Sato, Yokohama, JP;
Mitsuhiro Sugiyama, Yokohama, JP;
Yoshio Kobayashi, Yokohama, JP;
Taichi Inage, Yokohama, JP;
Tomotake Kato, Yokohama, JP;
Akihiko Nishikawa, Wolfsburg, DE;
Masahiro Umezawa, Yokohama, JP;
Michihiko Ayada, Yokohama, JP;
Suguru Kajigaya, Yokohama, JP;
NHK SPRING CO., LTD., Kanagawa, JP;
Abstract
A suspension coil spring includes a lower end turn portion, an upper end turn portion, and a helical effective portion formed between the end turn portions. The lower end turn portion includes a first portion which contacts a lower spring seat irrespective of a load, and a second portion which contacts the lower spring seat or is separated from the same according to the load. The wire diameter of the second portion is greater than that of the first portion and an average wire diameter of the effective portion. The upper end turn portion includes a third portion which contacts an upper spring seat, and a fourth portion. The wire diameter of the fourth portion is greater that of the third portion and the average wire diameter of the effective portion.