Internal centring device particularly suitable for connecting the ends of tubes
CA 2035799 C · Owner: Agip S.P.A. · Inventors: Berti, Dario; Chiuppani, Giovanni Antonio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An internal centring device which is particularly suitable for the connection of tube ends wherein there are fitted onto a central supporting member of mainly axial development two hollow mandrels of which at least one is adapted for axial movement and at least one is articulated on the said central body and is provided with at least three radial actuators which are disposed sufficiently remotely from the corresponding articulation for angular, positioning of the mandrel in relation to the said central body, each mandrel having an outer elastic sleeve which is capable of being radially expanded by an internal hydraulic axial actuator having two opposing threads. Also described are …
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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 February 6, 1991 and granted April 30, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 6, 2013.
- 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.