Reversible ratchet wrench
CA 2431192 A1 · Owner: Wu, Arthur · Inventors: Wu, Arthur
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A reversible ratchet wrench comprises a handle having a head portion at an end thereof. The head portion has a through hole a, first chamber and a second chamber. An engaging member is received in the through hole of the handle for free rotating. A pawl is received in the first chamber detachably meshed the engaging member. A switching device comprises an axle member and a turning member at an end of the axle member, and a driving device is made from a flexible wire to form a spiral coupling portion and a curved spring arm projected from an end of the coupling portion. The coupling portion is received in the second chamber and the spring arm is projected out to rest against the pawl at the …
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 12, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 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.