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:
Sep. 17, 1996
Filed:
Jul. 10, 1995
Yutaka Katou, Kariya, JP;
Aisin Seiki Kabushiki Kaisha, Kariya, JP;
Abstract
The invention is directed to a driving apparatus for a sewing machine which has a table, an upper rotary shaft provided horizontally above the table for driving a needle, a lower rotary shaft provided horizontally below the table for driving a shuttle, a transmission mechanism for transmitting a rotational force to rotate the upper rotary shaft and the lower rotary shaft in synchronous relationship with each other, and a driving device for rotating the upper rotary shaft and the lower rotary shaft. The transmission mechanism includes a first toothed pulley which is mounted on the upper rotary shaft and rotated together therewith, a second toothed pulley which is mounted on the lower rotary shaft and rotated together therewith, and a double toothed belt on both sides of which is provided with teeth for meshing with the first toothed pulley and the second toothed pulley, respectively. The belt is held to be meshed with the first toothed pulley at one side of the belt, and held to be meshed with the second toothed pulley at the other side of the belt.