Variable speed pulley
CA 1300405 C · Owner: Takano, Hiroshi · Inventors: Takano, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
M-612, "VARIABLE SPEED PULLEY", Abstract of the Disclosure In order to provide smoother transition for speed changes, a variable speed pulley having a movable sheave half and a fixed sheave half is provided with a torque cam. A spring biased the second sheave half axially of the first sheave to vary the width of a belt receiving groove. The torque cam forces the second sheave half in the same direction as the spring when the torque of a load operatively connected into the pulley assembly is increased. A centrifugal thrust arrangement urges the second sheave half in a direction reverse to the direction caused by the biasing means responsive to the rotational speed of the pulley.
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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- 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.