Device for controlling the rotation of a shaft
CA 2350134 A1 · Owner: Long, Dennis L. · Inventors: Long, Dennis L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The device (10) prevents a shaft (110) from rotating. When mounted on the shaft extending between the movement mechanisms (106) of a workstation (100) the device prevents the movement mechanisms from raising or lowering the work surface (102). A pair of fixed hubs (20 and 22) are fixably mounted on the shaft. A rotatable hub (24) is rotatably mounted on the shaft spaced between the fixed hubs. First and second wrap springs (28 and 30) extend between each of the fixed hubs and the rotatable hub. A pair of wrap springs are force fit over the fixed hubs and rotatable hub. The device also includes an anti-release mechanism which prevents release of the device when an additional force is applied …
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 June 8, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 2023.
- 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.