Method and apparatus for detecting rubbing in a rotary machine
CA 1195418 A · Owner: Hitachi, Ltd. · Inventors: Ikeuchi, Kazuo; Hisano, Katsukuni; Sato, Ichiya
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus for detecting the occurrence of rubbing in a rotary machine in which at, least one acoustic sensor is mounted on at least the rotor part or the stator part of the rotary machine and the, output signal from the acoustic sensor is detected and then filtered to extract a frequency component having a frequency substantially equal to the rotational frequency of the rotary machine, so as to detect the occurrence of rubbing in the rotary machine as early as possible and also to locate the source of the rubbing. Even when the occurrence of abnormal metal-to-metal contact at a bearing of the rotary machine is detected, it is discriminated from rubbing so that the occurrence of …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted October 15, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2002.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.