Spray-head for fighting fire
CA 2104302 C · Owner: Marioff Corporation Oy · Inventors: Sundholm, Goran
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a spray-head for fire fighting. The spray-head according to the invention comprises a housing having a central boring with a movable spindle (11) the spindle (11) comprising , a shoulder (11a) for defining an annular space (15) between the spindle (11) and a surrounding boring wall the annular space (15) , communicating with a respective feed line (3) and having the same cross-sectional area as the end of the piston (11) subected to the liquid pressure in the line (3). A spring force (16) is arranged to act on the piston (11) in the direction of release.
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 February 28, 1992 and granted May 7, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2014.
- 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.