Speed-shifting device
CA 1288261 C · Owner: Miyata, Hirofumi · Inventors: Miyata, Hirofumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pulley type speed-shifting device is provided with a driving pulley and driven pulley mounted on each transmission shaft which is placed parallelly and a belt, member trained between both Pulleys. A moving member is connected solidly movably in axial direction with one of the sideplate of both pulleys and is axially moved on the movable sideplate through screw motion caused by relative rotation around the transmission shaft. And a speedshifting pulley mechanism is provided for rotating the moving member relatively around the transmission shaft to change the transmission ratio between both transmission shafts in accordance with required mode change.
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
- Granted September 3, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 3, 2008.
- 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.