Concrete pump for the wet spraying process
CA 2034098 C · Owner: Schmittchen, Gunter · Inventors: Schmittchen, Gunter; Von Eckardstein, Karl Ernst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
With a concrete pump for the wet spraying method in which a standard concrete is pumped to a mixing nozzle where compressed air and if, necessary, setting accelerators are added to the concrete flow and this is applied with the nozzle and sealed, the invention is characterized according to a first solution of the object which is to on the one, hand, minimize the fine dust accumulation on the nozzle on the other, hand, to ensure that the amount of compressed air required for the wet spraying method is available, by a control system (20) in which the delivery of the concrete pump (1) forms the reference input for a volume control of the compressed air flowing to the mixing nozzle (3) in such, …
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
- Filed January 14, 1991 and granted May 30, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 14, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 14, 2013.
- 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.