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:
Jul. 06, 2021
Filed:
Jun. 21, 2018
Olympus Corporation, Hachioji, JP;
Shogo Hasegawa, Niiza, JP;
Sadayoshi Takami, Hachioji, JP;
OLYMPUS CORPORATION, Tokyo, JP;
Abstract
A control device controls a surgical instrument including a heater. The control device includes a first power supply, a second power supply, a resistance value calculation section, and an output control circuit. The first power supply outputs a first current having a first frequency and supplied to the heater. The second power supply outputs a second current combined with the first current, supplied to the heater and having a second frequency different from the first frequency. The resistance value calculation section separates a signal component related to the second current from the first and second currents having passed through the heater, and calculates a heater resistance value based on the signal component. The output control circuit controls a temperature of the heater based on the heater resistance value.