Universal grinder with reciprocal feeder
CA 2110405 C · Owner: O'Donnell, Ralph T. · Inventors: Nickels, James G.; Egging, Donald A.; Eddy, William A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A hammer mill apparatus (10) for comminuting materials such as wood branches, twigs, leaves, grasses, hay, and the like features a reciprocating batch feeder (24) for feeding the materials to be comminuted into a rotary grinder (68). Adjustable and spring biased feed drum (36) and metering roller (33) meters the material into the hammer mill. The positions of a series of adjustable curved grinding teeth (40) changes the sizes of the comminuted particles.
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 June 5, 1992 and granted August 3, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2014.
- 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.