Automatic overhead door opening system with dual motor drive and automatic door lock
CA 2322355 C · Owner: Harvey, Remy · Inventors: Harvey, Remy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An automatic overhead door opening system for a transport container whereby to operate the displacement of a panel door from a closed position to an open position. The system is housed in a restrained size housing which incorporates a motorized drive for driving an endless chain associated with an elongated central guide track on which the door is guidingly attached. The motorized drive is comprised of two small d.c. motors each having a drive gear drivingly coupled to a common driven gear of a gear drive which includes a worm gear in meshing engagement with a driven sprocket connected to a drive sprocket to displace the endless chain. The housing is of reduced thickness and access to the …
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 October 5, 2000 and granted August 6, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2022.
- 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.