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:
Jun. 03, 2003
Filed:
May. 18, 2000
Method and apparatus to provide dynamic ultrasonic measurement of rolling element bearing parameters
Richard W. Browner, Waterbury, CT (US);
Richard L. Lemoine, Collinsville, CT (US);
Mark I. Jurras, III, Canton Center, CT (US);
David Nguyen, Farmington, CT (US);
Robert Domnitz, Lexington, MA (US);
Alan Robert Selfridge, Los Gatos, CA (US);
The Torrington Company, Torrington, CT (US);
Abstract
An acoustic signal unit comprises a signal generation unit to generate a first electrical signal, a first transducer to generate an acoustic signal in response to the first electrical signal, and a second transducer to generate a second electrical signal in response to the received acoustic signal. A calculation unit is provided to compare the first and second electrical signals to determine the time of flight of the acoustic signal, wherein the time of flight corresponds to the stress in the rolling element bearing. The stress may be calculated according to a formula or by multiplying an acoustic time constant for the rolling element bearing by the distance traveled by the acoustic signal across the rolling element bearing, and by the time of flight determined by said comparison unit.