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:
May. 15, 2007
Filed:
May. 26, 2006
Atsushi Shiraishi, Chofu, JP;
Atsushi Shiraishi, Chofu, JP;
Juki Corporation, Tokyo, JP;
Abstract
A threading device for a sewing machine includes a needle bar provided with a guide member having a stopper portion, a threading shaft having a threading member, operation means having a guide groove formed in a spiral shape with respect to a rotating axis of the threading shaft, and a pin, which is fixed to the threading shaft, having both ends protruded outward in a radial direction with respect to the threading shaft. One end of the pin penetrates the guide groove while the other end of the pin engages with the stopper portion. The threading device further includes erroneous rotation preventing means which prevents the threading shaft from rotating in when the threading shaft moves downward, and permits the threading shaft to rotate when the second end of the pin engages with the stopper portion.