Beltless vacuum filter
CA 1105843 A · Owner: Schneider (J. R.) Co. Inc. · Inventors: Crowe, William D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A liquid filter apparatus wherein an elongated sheet of filter media is movable along an inclined support at the bottom of a receiving tank for dirty liquid below which is a collection tank for filtered liquid. The periphery of the collection tank is sealed by clean liquid supplied from an auxiliary reservoir at a pressure greater than the liquid in the receiving tank. A suction pump attached to the outlet from the collection tank helps to maintain flow of clean liquid through the media while filtered out material is accumulated on its upper surface. Fresh filter media is pulled into position from a supply roll to replace loaded filter media by drive means controlled to operate …
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 July 28, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 28, 1998.
- 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.