Drum for tilt mixer
CA 2015942 C · Owner: Strehlow, Robert W. · Inventors: Strehlow, Robert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved tiltable rotating concrete mixing drum has a relatively flat rear conical charging zone a front conical zone, having a central discharge opening for discharging materials when mixed and a generally cylindrical central zone disposed between front and rear conical zones in which the overall length-todiameter ratio is reduced. The improved mixing drum has two sets of mixing blades, one in the central or mixing zone and one in the front or discharge zone which is scoop-shaped and configured to increase the efficiency of mixing along the horizontal axis of the drum by increasing the overall mixing efficiency.
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 May 2, 1990 and granted October 26, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 2, 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.