Post driving attachment for tractor
CA 1092378 A · Owner: Craig, Frederick W. · Inventors: Craig, Frederick W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for driving posts into the ground comprises a hammer for striking the top of the post to be driven, an articulated arm for connecting the hammer to a mobile power unit; and means for raising the articulated arm so that the hammer is above the post. The hammer is pivotally connected to the arm so that the hammer will strike the top of the post generally squarely when the power unit is level and when the power unit is not level.
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 30, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 30, 1997.
- 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.