Noise reducing tool and method
CA 2031069 C · Owner: Bombardier Inc. · Inventors: Brooks, Gary E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present noise reduction system provides a tool and a method to dampen the vibration of sheet material such as a panel a metal sheet or a skin while performing a manufacturing operation on it, for instance riveting drilling, etc. This, noise reducing tool is held in place by vacuum and thus avoids the disadvantages associated with gluing and mechanical or magnetic fixing devices. This noise reducing tool includes a flexible pad made of a metal back sheet with a vibration damping sheet adhered to it and having an air seal surrounding the damping sheet such that the pad is held against the panel by action of a vacuum intermediate the damping sheet and the panel.
Read the whole patent
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
- Filed November 29, 1990 and granted November 17, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.