Controlled true geometry rock bit with one piece body
CA 2044069 A1 · Owner: Vezirian, Edward · Inventors: Vezirian, Edward; Vezirian, Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
CONTROLLED TRUE GEOMETRY ROCK BIT WITH ONE PIECE BODY" A rotary cone rock bit featuring a reproducible geometry and a one piece body is disclosed. Individual journal members, supporting rotary cutting cones have upwardly extending, structural shanks which are radially oriented and installed into downwardly directed individual hubs formed by the structural body of the rock bit. The shanks are subsequently secured as installed within the hubs. The primary controls over bit geometry comprise the radial orientation of the individual journal member and the, radial location of the individual hubs relative to the vertical bit body centerline.
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 June 7, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 7, 2013.
- 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.