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. 19, 1990
Filed:
Jun. 22, 1989
Yoshitaka Yaginuma, Naka, JP;
Isamu Hayashi, Naka, JP;
Mitsubishi Nuclear Fuel Co., Tokyo, JP;
Abstract
In a pipe inner-surface inspecting apparatus, a body is inserted into an interior of the pipe and has an illuminator mounted at a forward end of the body for emitting light forwardly from the forward end of the body. A reflecting mirror in the form of a conical surface is so arranged as to face toward the forward end of the body with a space left between the reflecting mirror and the forward end of the body. The reflecting mirror diverges away from the forward end of the body, and reflects the light from the illuminator to illuminate the inner surface of the pipe thereby forming an image thereof. A concentrating unit is arranged at the forward end of the body for concentrating the image of the inner surface of the pipe, which is reflected by the reflecting mirror, to transmit the image to a rearward end of the body. A transparent glass is interposed between the reflecting mirror and the forward end of the body. The transparent glass has a surface in close contact with the reflecting mirror, which has a central region formed with a recess.