Sod roll-out machine with endless tracks
CA 2118882 C · Owner: Woerner, Edward E. · Inventors: Woerner, Edward E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sod roll-out machine with endless tracks having a low center of gravity to prevent tipping on hills or inclines. The machine can be operated and steered by one person wherein the, roll of sod can be unwound in a forward or reverse direction. A pair of arms are elevated by hydraulic cylinders to facilitate the loading of a roll of sod to the distal ends of the arms and, to maintain the roll of sod slightly above the earth during the unrolling process. Due to the unique two track driving mechanism, the machine can be turned in place and operated in areas having limited accessibility. The tracks are driven by a motor, wherein each track can be individually controlled to be rotated in either …
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
- Filed March 11, 1994 and granted May 21, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 11, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 11, 2016.
- 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.