Gear drive unit with modifications
CA 2021460 C · Owner: Edwards, Douglas F. · Inventors: Edwards, Douglas F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transaxle or gear drive unit with ar improved shift mechanism and gear drive is set forth. The shift mechanism is of the shift key type and certain gears have recesses to receive a lug of the shift key with the recesses having ramps which depress the lug when the key is shifted. One of the gears has a smooth bore adjacent the recesses to serve as a neutral position for the shift key. A wide gear having teeth or splines around its periphery extending the length thereof is rotatably mounted on one shaft of the gear drive unit. The wide gear has a plurality of additional gears affixed thereto fox simultaneous rotation. The wide gear extends beyond the additional gears and connects with a …
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 July 18, 1990 and granted November 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 18, 2012.
- 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.