Reverse flow enhancers for apertured blades in concrete mixer
CA 1071186 A · Owner: London Concrete Machinery Co. (A Division Of Hodgson Machine And Equipme Nt Ltd.) · Inventors: Pawley, Jess W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a rotary concrete mixing drum mounted for rotation about a rotary axis, said mixing drum having a mixing chamber formed therein, said mixing chamber having a head end and a discharge end arranged opposite one another a mixing, blade disposed within said mixing chamber said mixing blade, having a mixing face directed toward said head end to establish a fluid flow in a direction toward said head end of said chamber in response to rotation of said blades in a mixing direction about said rotary axis and a discharge face directed toward the discharge end of said mixing drum to establish a fluid flow in a direction toward said discharge end of said chamber in response to rotation in said …
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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
- Granted February 5, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 5, 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
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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.