Conveyor belt dumping mechanism using horizontal idlers of varying lengths
CA 2018193 C · Owner: Wilson, William A. · Inventors: Wilson, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Inventor:, William A. Willson 83 Pheasant Drive, Marietta, GA 30067, ABSTRACT An array of idlers supporting a conveyor belt except beneath a generally crescent-shaped section opening outwardly to one side thereof. The array includes idlers of various lengths and orientations. Each of the idlers is disposed perpendicularly to the centerline of the belt. Both upstream and downstream of the crescent-shaped section, pairs of idlers slope downwardly toward each other on either side of the belt centerline. Where the belt is supported by these pairs of idlers, it assumes a troughlike configuration. Proximate the cresent-shaped section on the other hand, the idlers are unpaired and disposed …
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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 June 4, 1990 and granted August 17, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2012.
- 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.