Method of providing a consistent preload on thrust bearings in a bearing assembly
CA 2522374 C · Owner: Wenzel Downhole Tools Ulc · Inventors: Johnson, Orren
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of providing a consistent preload on thrust bearings in a bearing assembly. A first step involves placing against an inner race and an outer race of a bearing stack of thrust bearings deformable shims made from a material having a relatively flat stress-strain curve after its yield stress has been exceeded. A second step involves preloading the deformable shims beyond their yield point in situ until a predetermined preload tolerance is reached.
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 25, 2005 and granted January 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.