Peek bearing with trapped ptfe bearing liner
CA 2193672 C · Owner: Fisher Controls International, Inc. · Inventors: Wilson, Robert T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sleeve bearing (10) for use on rotary valve shafts (14) subjected to substantial operating pressures sufficent to extrude PTFE includes a cylindrical nonmetallic bearing jacket (11) preferably composed from PEEK. , The bearing jacket has a cylindrical inner cavity (20) defined between opposite annular cavity end lips (22, 24) within which cavity is disposed a cylindrical PTFE liner (12). The annular cavity end lips on the inner surface of the cylindrical nonmetallic bearing jacket extend inwardly to an end lip surface wherein the diameter of said end lip surface is slightly longer than the diameter of the rotary shaft (14) of the control valve. A suitable adhesive is used to bond …
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 June 19, 1995 and granted September 23, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 19, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 2017.
- 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.