Release mechanism for industrial doors and a method for providing separation of an industrial door
CA 2256366 C · Owner: Lester, Steve · Inventors: Hoerner, Bill; Knutson, Perry; Lester, Steve
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved release mechanism for use in combination with an industrial door and a method for providing separation of an industrial door which includes an , extension member extending across the doorway opening when the door is in its doorway blocking positions, the releasing mechanism including a roller mounted for movement with the extension member and a track including a guideway for , receiving the roller and guiding it during normal door operation the roller , and track being movable relative to each other upon application of a breakaway force to the extension member, thereby allowing the roller to escape from the track when a breakaway force is applied to the extension member 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 May 27, 1997 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 2019.
- 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.