Mill screen apparatus
CA 1317265 C · Owner: Graf, Carl R. · Inventors: Graf, Carl R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
21, Abstract of the Disclosure, Apparatus for reducing and sizing particulate material that is readily susceptible to efficiency enhancement with vibratory exciters. The apparatus includes a rotary drum particle size reduction device having a substantially imperforate drum, and a rotary screen having a perforate screening member with upstream and downstream portions said, upstream portion of the screen surrounding at least a portion of the periphery of the drum. A screen supporting member including a vibratory exciter engages an upstream portion of the screen for vibrating said upstream portion substantially independently of the drum.
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
- Granted May 4, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 4, 2010.
- 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.