Force-limiting rotary lock
CA 2444404 C · Owner: Nakashima, Kenneth K. · Inventors: Polcuch, Eric A.; House, William H.; Nakashima, Kenneth K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A force-limiting rotary lock (20) for a shaft (21) mounted on a housing (22) for rotational and axial movement relative thereto broadly includes a lug member (28) provided on the shaft and a pawl (51) mounted on the housing. The pawl is movable relative to the housing between first and second positions. The pawl is operatively arranged to engage the lug when the pawl is in its first position (shown in Fig. 3) to prevent further rotation ofthe shaft in one angular direction, and to be disengaged from the lug when the pawl is in its second position (shown in Fig. 2) to permit rotation of the shaft in either angular direction. A cam (25) is mounted on the shaft and a follower (49) is mounted …
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 October 6, 2003 and granted April 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 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.