Thrust bearing for down-hole tool
CA 2361746 A1 · Owner: Rotech Holdings Limited · Inventors: Susman, Hector Fillipus Alexander Van Drentham
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed an improved bearing and particularly an improved bearing assembly (15, 15A), eg. a thrust bearing assembly which may be used in down-, hole applications such as down-hole drilling applications. Thrust bearing assemblies for use in down-hole applications have the conflicting requirements of a thick shaft assembly and high axial load bearing capacity in a small crosssection. The invention, therefore provides: a bearing assembly (15, 15A) having at least two bearing elements (400 400A) spaced by a first body (500, 500A) the first body (500, 500A) having means for flexing. Thus when a load is applied to the bearing assembly (15 15A) the first body (500, 500A) is , …
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 February 3, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 3, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 3, 2022.
- 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.