Rock drilling rigs
CA 1067482 A · Owner: Steel Engineering Company Limited (The) · Inventors: Wallace, Trevor E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A mounting for a rock drilling machine comprising a drill feed leg composed of a fluid operated piston and cylinder; a support mounted for rotation about an axis, an adjustable counterbalancing arm with the cylinder of the feed leg, the support and the counterbalancing arm forming a triangle which can swing about an axis parallel to the support and which controls the elevation of the feed leg and with the piston of the feed leg extending beyond the triangle; a mount for a drilling machine carried by the piston; and an auxiliary beam attached to the front end of the piston and able to telescope into a structure that is fixed with respect to the cylinder so that it reinforces the piston.
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 December 4, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 4, 1996.
- 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.