Trailer floor cleaning system
CA 2301359 C · Owner: Edgemount Manufacturing Ltd. · Inventors: Shelby, David E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for cleaning the floor of a self unloading trailer of residual particulate material comprises in combination with moving slats of a typical self unloading trailer three rails each fashioned to be attached to the top of a slat, and a wedge-shaped sweeper having skates on a lower portion to ride along said rails. The sweeper rides along the rails by means of skate assemblies having pawls which may ratcheting along teeth formed in the rails as the sweeper moves rearwardly in the trailer. A control system sends signals to a motor contained within the sweeper to engage and disengage the pawls and to a, winch to draw the sweeper back to a starting position following operation.
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 20, 2000 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2022.
- 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.