Ratchet wrench with dual-rotating constant drive handle
CA 2093523 C · Owner: Midland Design Inc. · Inventors: Wannop, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A ratchet wrench (10) having a handle (12) through which a rotatable shaft (16) extends. A bevel gear (26) is coupled to one end of the shaft for rotation by the shaft about an input drive axis. A pair of concentrically aligned ring gears (30 32) are coupled to the bevel, gear for counter rotation of the ring gears by the bevel gear, about an, output drive axis perpendicular to the input drive axis. A drive member (64) is mounted inside the ring gears for rotation about the output drive axis. A ratchet mechanism (42, 44 52, 54) couples the ring, gears to the drive member such that for either direction of rotation, of the bevel gear one of the ring gears is coupled to the drive member and …
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 August 15, 1991 and granted September 1, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 15, 2013.
- 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.