Diamond crown bit
CA 1252459 A · Owner: Kazakhsky Politekhnichesky Institut Imeni V.I.Lenina · Inventors: Buzdov, Ruslan D.; Khashirov, Vladislav K.; Khazhuev, Vladimir S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A characteristic feature of the present invention resides in that the diamond-impregnated layer of the drilling bit matrix is shaped as a parallelepiped having its front and rear faces inclined while the insert is shaped as a triangular prism, one of whose side faces is rigidly coupled to the weld-on layer and the face, to the inclined rear face of the diamond-impregnated layer.
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 11, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 11, 2006.
- 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.