Crankshaft with hollow pins
CA 2002191 C · Owner: Emitec Gesellschaft Fur Emissionstechnologie Mbh · Inventors: Swars, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the case of a crankshaft with hollow pins cross-, sectionally distributed expanding sleeves inserted into the exit apertures of the main pins and crank pins in the crank webs. These sleeves generate a prestress in the material of the crank webs in order to increase the bending and torsional strength and to avoid the formation of cracks in the endangered shaft cross-section. Further expanding means in the pins extending along the length of the pins increase the natural frequency of the shaft in uncritical areas.
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 November 3, 1989 and granted February 22, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 3, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 3, 2011.
- 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.