Friction bearing for deep well drilling tools
CA 1282448 C · Owner: Kruger, Volker · Inventors: Kruger, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Friction bearing for deep well drilling tools especially drill bit direct drives, with a trace ring and a bearing ring where the bearing ring has bearing segments whose friction bodies are supported on the sliding face of trace ring and the trace ring has a ring-shaped bearing body, e.g. made of steel and prefabricated molded bodies with a bearing material that is hard and wear resistant provided at least on the top side of the bearing body characterized by the fact that the sliding face of the trace ring is formed by a number of molded bodies countersunk so they are flush with the surface of the bearing body and they are arranged side by side in a mosaic pattern, with their surfaces …
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
- Granted April 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2008.
- 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.