Opening device for drill rods for an extension rod drilling equipment
CA 1256422 A · Owner: Oy Tampella Ab · Inventors: Leppanen, Jarmo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An opening device for drill rods for an extension rod drilling equipment, which device comprises a drilling machine (2) displaceable along a feeding beam (1) a sta-, tionary drill rod retaining centralizer (3) positioned on the drilling axis (A) for the drill rod and a drill, rod gripping centralizer (4) positioned between the retaining centralizer and the drilling machine. In order to speed up the disconnection of the drill rods and in, order to simplify the structure the retaining central-, izer is provided with a rotating mechanism (15) for the rotation thereof and the gripping centralizer is connected to an actuating device (22) for the displacement thereof in the direction of a …
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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 June 27, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 27, 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.