Dry pipe valve system
CA 2289766 C · Owner: Beukema, John A. · Inventors: Beukema, John A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the dry pipe sprinkler valve arrangement disclosed in the specification a, dry pipe sprinkler line (10) is normally supplied with air at a pressure in a range from, about 5 psi to about 20 psi and is connected through a check valve (16) a dry , pipe, valve (18) and a manual control valve (20) to a water supply line (22). The dry pipe, valve (18) has a clapper (52) which is normally retained in the closed position by a, latch member (58). An actuating valve (32) having a diaphragm (30) which receives, air pressure from the sprinkler line (10) on one side and engages an orifice (84) to, which water from the water supply is applied on the other side permits the latch , member (58) to …
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 May 3, 1999 and granted July 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 3, 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.