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:
Feb. 20, 2001
Filed:
Jun. 21, 1999
Applicant:
Inventor:
Michael Philip Goldowsky, Valhalla, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61B 8/00 ;
U.S. Cl.
CPC ...
A61B 8/00 ;
Abstract
A rotor is disposed coaxially in a tubular housing and spaced therefrom to define a gap for receiving a fluid. An ultrasonic transducer is mounted at one end of the housing in alignment with a target at a corresponding end of the rotor. Ultrasonic pulses are bounced off the target for measuring linear position thereof based on the speed of sound in the fluid and round trip pulse time between the transducer and target. The speed of sound in the fluid between the transducer and target is self-calibrated.