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:
Nov. 27, 2018
Filed:
Jun. 23, 2011
Takayuki Matsuoto, Ichihara, JP;
Kazuhisa Michibata, Ichihara, JP;
Satoshi Ieiri, Ichihara, JP;
Takashi Yajima, Ichihara, JP;
Takayuki Matsuoto, Ichihara, JP;
Kazuhisa Michibata, Ichihara, JP;
Satoshi Ieiri, Ichihara, JP;
Takashi Yajima, Ichihara, JP;
MITSUBISHI STEEL MFG. CO., LTD., Tokyo, JP;
Abstract
A coil spring has an effective section that functions as a spring when a load in a coil axis direction has been applied, end turn sections that are formed on both ends of the effective section, and rising sections that are formed between the effective section and the end turn sections, wherein the rising sections are formed in such a way that, when θrepresents the pitch angle of the rising sections and θrepresents the pitch angle of the effective section, pitch angle θ>pitch angle θholds true in at least one of the rising sections.