Equipment for use on covering a sports stadium
CA 2290812 A1 · Owner: Lauritzen, Jan Kare · Inventors: Lauritzen, Jan Kare
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A covering equipment for use on sports arenas for protection against precipitation is shown. The equipment comprises a driving motor (6 9) and a , longitudinal drum (14) for coiling and uncoiling a covering sheet such as a , tarpaulin or plastic coversheet. The casing (6) for the driving motor is arranged so as to rotate independently relative to the elongate drum (14) the , motor drive shaft (9) is rigidly connected to the drum (14) for rotation therewith, and the motor casing (6) is fixedly connected to a reaction arm (2) which makes contact with the gound, so that during motor operation the casing (6) of the driving motor remains stationary with respect to rotation while the drum …
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 16, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 16, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 16, 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.