Bi-directional pass-point system for controlling the operation of movable barriers
CA 2589760 A1 · Owner: Dombrowski, Kenneth J. · Inventors: Fitzgibbon, James; Olmsted, Robert John; Siegler, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An operator for opening and closing movable barriers such as garage doors comprising a pass-point system which is a component of an operating head. The operator also comprises a motor and a transmission assembly for transmitting power from the motor to the barrier. A controller is used to set a limit point and for controlling motor operation. The controller is responsive to an input command and generates a signal for enabling the motor to move the barrier approximately to the limit point stopping , approximately at the limit point. A limit system includes a pass point system which defines an intermediate reference point and which provides a pass point signal to the controller when …
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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 March 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2021.
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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.