Damping system for vibrating members
CA 2266520 A1 · Owner: Fricke, J. Robert · Inventors: Fricke, J. Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The low-density granular fill has a specific gravity less than 1.5 placed in , hollow cavities built into turbomachinery blades vanes, and shafts, and , provides effective damping at lower frequencies than conventional passive damping treatment due to its low bulk compressional sound speed. Selected materials used for the granular fill treatment are chosen for specific turbomachinery needs, including temperature of operation. Rotation speed is also a factor because it induces on the granular material an apparent hydrostatic pressure associated with the centripetal acceleration and sound , speed in granular materials is a function of pressure raised to the power 1/n. Preferred designs …
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 September 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2019.
- 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.