Intermittent-action apparatus for filtering liquid
CA 1294222 C · Owner: Shishkin, Viktor V. · Inventors: Shapovalov, Jury P.; Kryazhevskikh, Nikolai F.; Shishkin, Viktor V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An intermittent-action apparatus for filtering liquid has a sealed casing in which a hollow cylinder is mounted so as to define with the casing an annular space communicating with a system for removing precipitate. A driven drum is provided in the upper part of the casing and one end of a filtering hose is secured to the drum the, other end of the hose being turned inside out and secured along the perimeter to the hollow cylinder so as to define around the remaining part of the hose an annular space for liquid being filtered, the annular space varying in volume during accumulation of precipitate therein and during movement of the hose under the action 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 January 14, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 14, 2009.
- 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.