Over-center locking mechanism for tow truck wheel lift or the like
CA 2235009 C · Owner: Watson, Scott A. · Inventors: Young, Charles E.; Watson, Scott A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a wheel grid assembly (25) and vehicle towing apparatus. The wheel grid assembly (25) includes a wheel boom (26) and a pair of lift arms (31A, 31B). Each lift arm (31A 31B) consists of an extension arm , segment (32) transversely fixed to the wheel boom (26) and an engaging arm , segment (33) having a pivot point designed for pivotal mounting near the end of the extension arm segment (32), remote from the wheel boom (26). The engaging arm segment (33) is made up of an actuating arm segment (35) and a gripping arm segment (34) extending in different directions from the pivot point. A pair of linear actuators (41) are pivotally attached to the wheel …
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 November 7, 1996 and granted September 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 7, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2018.
- 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.