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. 25, 2025
Filed:
Mar. 29, 2023
Janome Corporation, Tokyo, JP;
Kentaro Akahane, Tokyo, JP;
JANOME CORPORATION, Tokyo, JP;
Abstract
A sewing machine includes a rotational speed determination unit configured to determine a rotational speed instruction value on the basis of information from a movement detection sensor that detects movement of a workpiece and a predetermined sewing pitch amount, an upper limit rotational speed setting unit configured to set an upper limit rotational speed value, a rotational speed control unit configured to control a rotational speed to the rotational speed instruction value and control the rotational speed to the upper limit rotational speed value when the rotational speed instruction value reaches the upper limit rotational speed value, and a sewing machine motor driven at the controlled rotational speed to operate a needle. Rotational speed control of the sewing machine motor according to a movement amount of the workpiece is executed, but the rotational speed is controlled so as not to exceed the upper limit rotational speed.