Earth drilling apparatus
CA 1204428 A · Owner: Becker, Floyd Walter · Inventors: Becker, Floyd Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a drill pipe rotary drive mechanism for an earth drilling apparatus comprising a housing a drive, member mounted in the housing for rotation therein about a rotary axis and having an axial bore opening at each end to the exterior of the housing, and a drive mechanism in the housing for rotatably driving the drive member. A drive coupling tool is adapted to be readily removably mounted in the drive member so that the drive mechanism can be used for rotatably driving different types of earth drilling tools, the coupling tool having a tubular body portion telescopingly removably mounted in the axial bore of the drive member, the body portion having an axial opening …
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 May 13, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 2003.
- 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.