Process allowing attachment
CA 2005404 C · Owner: Maus, Wolfgang · Inventors: Maus, Wolfgang; Swars, Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for allowing the attachment of drive or coupling elements, such as cams, gears crank webs or bearing, elements, such as friction bearing bushes or complete roller, bearings on tubes or tubular portions by hydraulic expansion for the purpose of producing assembled cam shafts transmission, shafts, crank shafts or the like with the expansion of the, tubes taking place exclusively in the region of the respective elements beyond the limit of elasticity of the tubes against a, permanent elastic prestress in the elements. To relieve the load on the seals limiting the regions to be expanded a, counter pressure which is higher than the ambient pressure is applied to the intermediate or end …
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 December 13, 1989 and granted August 4, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 13, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 13, 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.