Backwater tank for a building connected to a vacuum drain facility
CA 1089317 A · Owner: Electrolux G.M.B.H. · Inventors: Michael, Harald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A backwater tank system is provided for a building connected to a vacuum drain facility wherein the waste water of the building is drained off by gravity feed lines into a collector which is connected to a vacuum drain conduit by means of a pneumatically controlled shut-off valve that opens automatically at a specific maximum water level and wherein a ventilated, backwater tank is connected to the gravity conduit or the collector at a level above the maximum water level in the collector the capacity of the backwater, tank being large as compared with that of the collector. The shut-off valve and the pneumatic control devices therefor are disposed in or on the tank outside the main chamber …
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 November 11, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 11, 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.