Guiding head
CA 1111410 A · Owner: Adam, Arthur · Inventors: Adam, Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an apparatus for forming horizontal subterranian holes there is described a guide head for attachment to a broaching head comprising a central elongate shaft adapted at one end thereof for releasable connection to the broaching head and a plurality of radial fin members disposed about the shaft to provide directional stability during the pushing of the broaching head through the ground.
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 October 27, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 1998.
- 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.