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:
Dec. 04, 1990
Filed:
May. 11, 1989
Yoshitake Saito, Kunitachi, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
An ultrasonic probe for use in the ultrasonic endoscope including a damping layer arranged on a rear surface of an ultrasonic vibrating element for absorbing an undesired ultrasonic wave emitted from the rear surface of the vibrating element, an insulating layer and a conductive housing. A matching coil for improving the efficiency of the vibration of the ultrasonic vibrating element is formed as an air-core type and is embedded within the damping layer or the insulating layer such that the undesired ultrasonic wave is passed through a hollow central space of the air-core type matching coil and is effectively absorbed by the damping layer, so that the damping function of the damping layer is not affected by the matching coil.