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:
Oct. 28, 2025
Filed:
Aug. 01, 2023
Nakanishi Inc., Kanuma, JP;
Toyohei Nakajima, Kanuma, JP;
Masahiro Higashi, Kanuma, JP;
NAKANISHI INC., Kanuma, JP;
Abstract
An abnormality determination device for a dental handpiece, the abnormality determination device including: an electrical current output unit configured to supply, to a drive motor attached to the dental handpiece, a test electrical current in a no-load state, the test electrical current being smaller than a no-load electrical current at a rotational speed of the dental handpiece during a normal treatment in the no-load state; a rotational speed detector configured to detect a rotational speed of the drive motor in a state where the test electrical current is supplied; a processor configured to compare the rotational speed detected by the rotational speed detector with a threshold rotational speed; and an abnormality detector configured to determine abnormality that the dental handpiece is abnormal if the rotational speed detected by the rotational speed detector is smaller than the threshold rotational speed.