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. 06, 2024
Filed:
Jun. 06, 2019
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
NIPPON TELEGRAPH AND TELEPHONE CORPORATION, Tokyo, JP;
Abstract
An inspection method of the present invention includes supplying water from a tank to an interior of a conduit through a hose provided at one end of the conduit, releasing air from the interior of the conduit to an outside of the conduit through an air vent tube provided at another end of the conduit, determining whether or not water that does not contain air is drained from the air vent tube, when it is determined in the determining that water that does not contain air is drained from the air vent tube, stopping supplying water to the interior of the conduit, closing a valve of an air vent portion, and blocking both ends of the conduit, and performing pressurization by increasing a pressure of the interior of the conduit whose both ends are blocked and whose interior is filled with water, and measuring a pressure value of the interior of the conduit when the pressurization ends and a pressure value of the interior of the conduit when a predetermined period of time elapses.