Unidirectional ratchet wrench
CA 2444777 C · Owner: Snap-On Incorporated · Inventors: Dekeuster, Michael T.; Foster, Michael L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ratchet wrench is provided which includes a handle having a head on the handle, a , rotatable gear disposed in the head and having ratchet teeth and a pivotable , pawl engaged , with the gear to allow ratcheting rotation of the gear in a first direction and prevent ratcheting , rotation of the gear in a second direction. An obstruction is engageable with a cam surface at , the base of the pawl in order to prevent the pawl from self-reversing.
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 8, 2003 and granted September 13, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 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.