Drill tool
CA 1295605 C · Owner: Santrade Limited · Inventors: Jansson, Kjell-Ove Lennart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a drill tool for rotary and/or percussive drilling comprising a central pilot bit (12) and a, in the feed direction of the tool, behind the pilot bit located eccentric reamer (11;11') that via guide means (10) is connected to a drill string that is rotatably coupled to a drill machine said drill string and the guide means (10) being at least partially surrounded by a casing tube (15). The drill tool also comprises means to supply flush medium and means to remove flush medium and cuttings. The reamer (11;11') is driven through a cooperation between a tongue (21;21') and a shoulder (22,24;22',24'), said tongue (21;21') can be located either on a portion (16) …
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 February 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 11, 2009.
- 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.