公开(公告)号：US20250146897A1

公开(公告)日：2025-05-08

申请号：US18702584

申请日：2022-10-07

Applicant: NOK CORPORATION ,  TOKYO UNIVERSITY OF SCIENCE FOUNDATION

Inventor： Takayuki SAKURAI ,  Kentaro OSADA ,  Hikaru TADANO ,  Tomohiro KAWAI ,  Keishi NISHIO

IPC: G01M3/22

Abstract: A rubber product capable of easily and accurately detecting the presence or absence of leakage and a position of the leakage is provided. A rubber product includes a gas chromic material that changes a color thereof reversibly or changes an electric resistance value thereof, due to oxidation-reduction reaction. The rubber product is a sealing member (sealing product 10) for sealing a gap between two members, wherein the sealing member includes a gas chromic material that changes a color thereof reversibly or changes an electric resistance value thereof, due to oxidation-reduction reaction, and has a ring shape.

公开(公告)号：US20220349770A1

公开(公告)日：2022-11-03

申请号：US17764569

申请日：2020-08-31

Applicant: NOK CORPORATION

Inventor： Yuta KASAI ,  Shotaro KARUBE ,  Hikaru TADANO ,  Masashi TAKEKOSHI ,  Takayuki SAKURAI

IPC: G01M3/20 ,  H01M8/0271

Abstract: A seal inspection device includes: a first holder including a port surrounded by an inspection target, and a through hole connected to an outside-leak detection flow path; a second holder holding the inspection target between the first and second holders; an inspection-place sealing portion forming, into a closed space, a space where the inspection target is arranged, in cooperation with the first and second holders; a pressurization valve connecting the port to both a supply source of an inspection gas and an exhaust system; a detector for the inspection gas; a first measurement valve connecting the detector to the port; and a second measurement valve connecting the outside-leak detection flow path to the detector.