Gas seal for rotating grinding mill having peripheral discharge
CA 1069148 A · Owner: Union Carbide Corporation · Inventors: Stone, Tyrus H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A gas tight seal is provided for a rotating grinding mill having peripheral discharge outlets. The mill has a rotatable shell into which the material to be ground is fed. During operation the shell is provided with a gaseous inert atmosphere. The seal comprises annular members adjacent the shell with circumferential grooves in said annular members carrying pressurized gas which prevents fine particles from lodging between the bearing surfaces on which the shell rotates and which also prevents loss of inert gas from the shell. S P E C I F I C A T I O N - 1 -
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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 January 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 1, 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
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.