Ratcheting screwdriver
CA 2118072 A1 · Owner: Snap-On Incorporated · Inventors: Thompson, Christopher D.; Hoepfl, Joseph R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ratcheting driver handle has a ratchet body pressfitted axially in one end thereof, the body defining a socket which receives a gear for rotation coaxially with the handle. The socket also receives two pawls respectively disposed above and at opposite sides of the axis and springbiased into engagement with the gear. A selector cap rotates on the housing and carries a first pin for driving the pawls respectively out of engagement with the gear depending upon the direction of rotation to control the, ratchet direction. A second pin on the cap engages an overcenter leaf spring mounted in the socket below the gear for resiliently retaining the mechanism in either of the forward or reverse …
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 13, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 13, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 13, 2016.
- 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.