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. 10, 2020
Filed:
Dec. 16, 2014
Mitsubishi Steel Mfg. Co., Ltd., Tokyo, JP;
Takashi Eto, Ichihara, JP;
Mitsubishi Steel Mfg. Co., Ltd., Tokyo, JP;
Abstract
A coil spring end forming apparatus is provided that includes a pair of horizontally disposed parallel rollers; a mandrel; a stopper that is provided adjacent to the circumferential surface of the mandrel and is moved up or down and rotated integrally with the mandrel; a clamp jig that is provided so as to be movable toward or away from the mandrel and that holds a semi-formed spring in cooperation with the mandrel, and a pusher for pushing the semi-formed spring toward the stopper, wherein in a state in which the axis of the mandrel is positioned between the axes of the parallel rollers and the semi-formed spring, a clamp portion holds the semi-formed spring at the inner side of a triangle formed by the axes of the parallel rollers and the semi-formed spring and rotates around the axis along the winding direction of the semi-formed spring to form a pigtail portion at one end of the semi-formed spring, and a coil spring end forming method is further provided.