Downhole oil-sealed bearing pack assembly
CA 2280481 A1 · Owner: Beshoory, Edward Joseph · Inventors: Beshoory, Edward Joseph
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A downhole oil-sealed bearing pack assembly is provided for protecting bearing elements and seals. The bearing pack assembly includes a non-contact flow, restrictor for reducing large differential pressures across sealing elements. The , non-contact flow restrictor includes an inner restrictive element attached to a rotatable, drive shaft and an outer restrictive element secured to a stationary bearing housing. The inner restrictive element can include an outwardly extending ring adjacent to a, first land and the outer restrictive element can include an inwardly extending ring, adjacent to a second land. During rotation of the drive shaft the inwardly and outwardly extending rings …
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 August 18, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 18, 2021.
- 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.