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. 18, 2006
Filed:
Oct. 10, 2001
Kenneth S. Kramer, Loveland, OH (US);
Eitan T. Wiener, Cincinnati, OH (US);
William T. Donofrio, Cincinnati, OH (US);
Kevin Houser, Springboro, OH (US);
Foster B. Stulen, Mason, OH (US);
Kenneth S. Kramer, Loveland, OH (US);
Eitan T. Wiener, Cincinnati, OH (US);
William T. Donofrio, Cincinnati, OH (US);
Kevin Houser, Springboro, OH (US);
Foster B. Stulen, Mason, OH (US);
Ethicon Endo-Surgery, Inc., Cincinnati, OH (US);
Abstract
A method for calculating the capacitance of a transducer (C) without knowing the exact resonance frequency of a transducer/blade combination is achieved by sweeping across a broad frequency range which contains resonant and non-resonant frequencies where Ccan be measured. A pre-defined frequency range is set independently of the resonance frequency of a specific transducer/blade combination. Cof the transducer/blade is measured at several different frequencies within the pre-defined frequency range to ensure that invalid Cmeasurements are disregarded, and the temperature of the transducer is calculated based on valid Cmeasurements. The determined transducer temperature, based on Cmeasurements, can be used to optimize performance and/or provide a safety shutdown mechanism for the generator.