Cycle crank
CA 2307608 A1 · Owner: Haaheim, Oyvind · Inventors: Haaheim, Oyvind
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cycle crank comprises at least one chain wheel (1) which is rotatably mounted about a centre axis (2) and two pedal arms (3 3') each of which is , restrictedly rotatably mounted in the chain wheel in its eccentric rotating joint (6, 6'). Two spring devices (8, 8') are each attached in the chain wheel in its eccentric first spring attachment (11 11'), and pulls the pedal arms , towards the centre axis (2). The pedal arms (3 3') can rotate between an , inner position in which they are turned towards the centre axis (2) and an outer position in which they point substantially radially out from the centre axis. An angle (v2) which is formed by a line between the first spring attachment …
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 October 7, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2020.
- 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.