Road making apparatus
CA 1282955 C · Owner: Freeman, Peter Douglas · Inventors: Freeman, Peter Douglas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arrangement of a roller in combination with a draft vehicle particularly a road grader, in which the roller is secured to the draft vehicle so as to inhibit rotation of the draft frame about a vertical axis relative to the draft vehicle. There is disclosed a road grader having a roller secured to a three-point linkage so that load can be transferred to the roller. A common conduit provides means to maintain inflatable tyres providing a periphery of the roller to a common pressure.
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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2008.
- 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.