Method of discharging sewage by vacuum and control apparatus for carrying the method into effect
CA 1282299 C · Owner: Tank, Wolfgang · Inventors: Tank, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is essential for optimum operation of a vacuum sewage line to cause an injection of air to follow behind a preceding operation of removal of sewage by suction. The invention solves the problem of dividing large quantities of sewage that are produced into portions and of conveying them through the vacuum sewage pipe by the triggering of a secondary air valve for the supply of air necessary after each suction operation.
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 April 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 2, 2008.
- 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.