US Patent 7603957 Thread cutting device of sewing machine

Patent 7603957 was granted and assigned to Juki on October, 2009 by the United States Patent and Trademark Office.

Overview Structured Data Issues Contributors Activity

Is a

Patent

Patent attributes

Current Assignee

Juki

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76039570

Patent Inventor Names

Atsushi Shiraishi0

Date of Patent

October 20, 2009

Patent Application Number

119055700

Date Filed

October 2, 2007

Patent Primary Examiner

‌

Ismael Izaguirre

Patent abstract

A thread cutting device includes a thread catching member having a catching portion, wherein the thread catching member moves back and forth across a path of a lower thread reeled out from a bobbin so as to catch the lower thread by the catching portion and cuts the lower thread by cooperating with a fixed knife, a first power transmitting portion which transmits a power to the thread catching member, a first cam member provided on a lower shaft rotated by a sewing machine motor and transmits a first moving force to the thread catching member through the first power transmitting portion, a second power transmitting portion which transmits a second moving force from a stepping motor to the thread catching member through the first power transmitting portion.