Selectable ratio transmission and method of visual identification of the ratio
CA 1266192 C · Owner: Harrod, Lawrence R. · Inventors: Harrod, Lawrence R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A transmission that uses a gear set in the form of a pair of gears stacked rigidly together to couple a driving gear to a driven gear has its ratio determined by the relative number of teeth of the stacked gears and the gears with which the stacked gears mesh. If the number of teeth of either or both gears in the stack is varied the axle of, the stack must be moved to a different location in order to keep all of the pairs of gears meshed. The transmission has two or more axle-receiving locations to receive the axles or stacks effecting different ratios. To simplify assembly the stacks are color-coded according to the ratios they effect. Stacks of the chosen color will only fit in one axle …
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 February 27, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 27, 2007.
- 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.