Mechanical seal
CA 2000910 A1 · Owner: Bep Bestobell Sa (Pty) Limited · Inventors: Hinks, Raymond William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mechanical seal arrangement for use in association with a pump casing structure and a drive shaft for driving a pump impeller which is housed in the pump casing structure is, disclosed, the seal arrangement comprising: a rotatable seal ring having a seal face mountable concentrically on the drive shaft for rotation with the drive shaft;, a non-rotatable seal ring having a seal face mountable in axial alignment with the rotatable seal ring assembly; and, biassing means for urging the rotatable and non-rotatable seal rings axially towards each other for effecting sealing engagement of the seal faces of the respective seal rings; the arrangement being characterized therein that the biassing …
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 October 18, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 18, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 18, 2011.
- 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.