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:
Jan. 04, 2005
Filed:
Feb. 20, 2003
Keiji Hasegawa, Toyoake, JP;
Shinsuke Okura, Nagoya, JP;
Keiji Hasegawa, Toyoake, JP;
Shinsuke Okura, Nagoya, JP;
Chuo Hatsujo Kabushiki Kaisha, Nagoya, JP;
Abstract
A method for producing a helical spring by coiling an element wire while feeding the wire, and performing an after-treatment includes at least a warm setting process. The method includes (1) providing a plurality of parameters for defining a desired configuration of a target helical spring, (2) performing a warm setting simulation for defining a change in configuration of a certain helical spring by applying thereto the warm setting process through a simulation, to determine a free height of a helical spring before the warm setting process on the basis of a free height of the target helical spring, (3) determining a configuration of the helical spring before the after-treatment, on the basis of at least the free height of the helical spring before the warm setting process and the plurality of parameters, (4) coiling the element wire on the basis of the configuration of the helical spring before the after-treatment to produce a coiled wire, and (5) applying the after-treatment to the coiled wire, to produce the target helical spring.