Drilling tool
CA 2308679 A1 · Owner: Nql Drilling Tools Inc. · Inventors: Balsa, Manuel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drilling tool is formed from a drive shaft having a coupling end the , coupling, end having a cylindrical portion an adapter housing having an encircling wall defining, a socket, the coupling end of the drive shaft being received by the socket and an, annular recess formed in the encircling wall of the adapter housing. A seal carrier ring is, seated in the annular recess. The seal carrier ring is radially movable within the annular, recess, with the seal carrier ring sealed to the encircling wall to form a sliding seal. The, seal carrier ring is also axially slidable on and sealed to the drive shaft. The arrangement, permits eccentric movement of the drive shaft within the adapter …
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 May 17, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 17, 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.