Drum filter with cake dewatering
CA 1054530 A · Owner: Envirotech Corporation · Inventors: Davis, Steven S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A dewatering machine comprises an integral and cooperative combination of a vacuum filter of the rotary drum type and an expression device of the diaphragm type. An intermittentlyindexed endless filter medium belt carries a sheet of filter cake to the expression device after the cake is formed on the vacuum filter. The belt indexing action is coordinated with pressurization of the expression device so that the filter drum is indexed only when the diaphragm is relaxed and the pressurization is effected only at such times as the drum is not being indexed. - 1 -
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 15, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 15, 1996.
- 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.