Drapery actuator
CA 2252347 C · Owner: Mao, Kai Ming · Inventors: Mao, Kai Ming
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drapery actuator to open and close draperies comprising a housing and, a drive pulley supported by the housing to engage a drapery cord coupled to a drape. A motor, typically a D.C. motor is supported by the housing for , providing torque to reversibly rotate the drive pulley to move the drapery cord between a, first extreme (typically closed) position and a second extreme (typically open), position. A first electrical switch operatively connected to the motor functions, as a cut-out switch and reversing switch to stop the motor from continued turning, in a given direction and thereafter switching polarity to allow the motor to , turn, in an opposite direction when the switch is …
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 November 3, 1998 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2020.
- 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.