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:
Nov. 27, 1990
Filed:
Dec. 22, 1988
Bjorn A Angelsen, 7037 Trondheim, NO;
Other;
Abstract
A miniaturized ultrasonic probe comprises a housing encasing a motor, an ultrasonic transducer mounted for controlled rotation on the motor shaft, and an angular position sensor connected to the shaft. The housing has a radiating dome about the transducer and is sealed and wholly filled with an acoustically-transparent fluid. The dual frequency transducer operatively emits either of two ultrasonic frequency beams from opposed faces of a sandwich-like construction, and the position sensor is implemented using a low mass variable-inductor arrangement. The resulting probe attains unusually rapid accelerations and changes in beam direction with highly accurate control of transducer orientation, all in a miniaturized construction particularly well adapted for operative insertion in a human or animal body cavity or surgical site.