Apparatus for limiting the outgoing air flow in natural ventilation systems
CA 1047825 A · Owner: Tekno Term Systems Ab. · Inventors: Eriksson, Olov R. L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure This invention relates to a natural ventilation system for buildings and comprises for use at an outlet portion of a venting duct a movable duct closing means and a temperature sensing means which is connected to operate said duct closing means and is mounted to be exposed to prevailing temperature and wind conditions in the atmosphere outside the venting duct as well as to at least a portion of the outgoing air flow in the venting duct to be actuated thereby and accordingly to operate the venting duct closing means whereby the sensing, means will operate so as to a) gradually close the venting duct closing means at increasing wind force b) gradually open, the …
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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 February 6, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 6, 1996.
- 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.