Sealing arrangements
CA 2065171 A1 · Owner: Cooper Industries, Inc. · Inventors: Thornburrow, Edward T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealing arrangement in which a sealing member 25 seals against an annular sealing surface 20. The sealing member 25 has an annular sealing surface 29 the axis of which is offset relative to the rotational axis of the surface 20. Thus when the annular surface 20 rotates the area swept out by the sealing member surface is larger than the area of its sealing surface. The arrangement has application to seals for gate valve stems.
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 April 6, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 6, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 6, 2014.
- 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.