Method and apparatus for pulse variable-controlled movable obstacle detection
CA 2448910 A1 · Owner: Fitzgibbon, James J. · Inventors: Fitzgibbon, James J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pulse variable information is used to control at least obstacle detection and also, optionally, speed of movement of a movable barrier. In one embodiment pursuant to a learning mode (50) the movable barrier is moved (51) and while , moving the movable barrier, at least one pulse variable that corresponds to movement of the movable barrier at a desired speed is measured (52) and used to determine at least one predetermined threshold that corresponds to a level of excessive force as exerted by the movable barrier. This threshold can then be used during an operating mode to facilitate detection of barrier obstacles.
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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
- Filed April 4, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 4, 2025.
- 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.