Nozzle for producing high-impact long-range jet from fan-blown air
CA 2265155 C · Owner: Davidson, John Frederick Hayden · Inventors: Davidson, John Frederick Hayden; Davidson, Kirk John William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Blow-off nozzles are used for creating a high-energy air blast for drying , metal panels prior to, painting. Depth or reach of penetration (in the atmosphere) is important. A bullet is provided, in the centre of the nozzle. The bullet is aerodynamically faired for minimum , drag. The effect, of the bullet is to create a low pressure area in the jet downstream of the nozzle. The low, pressure area serves to hold the jet together preventing spreading, to a , degree that enables a significant increase in penetration distance. The bullet is mounted on faired arms, which are, secured to the walls of the nozzle.
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 March 10, 1999 and granted July 22, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2021.
- 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.