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:
Apr. 07, 2026
Filed:
Dec. 15, 2021
Nok Corporation, Tokyo, JP;
Tatsuya Saito, Shizuoka, JP;
Tomohiro Kawai, Kanagawa, JP;
NOK CORPORATION, , JP;
Abstract
The gas permeation amount of each of a plurality of rubber sealing components manufactured according to the same specifications is measured by helium leak testing, and for each sealing component, sample data is acquired which is formed of a pair of a measurement value at a criterion time CT in an unstable period A, during which the permeation amount increases, and a measurement value in a stable period B, during which the permeation amount is stable (sample acquisition). The relationship between the measurement value at the criterion time CT and the measurement value in the stable period is defined by a linear function on the basis of the plurality of acquired sample data (function definition). The gas permeation amount of a sealing component to be inspected which has been manufactured according to the same specifications as those for the plurality of rubber sealing components is measured by helium leak testing, and a measurement value in the stable period B is estimated, using the defined linear function, on the basis of the measurement value in the unstable period A of the sealing component to be inspected (leakage amount estimation).