Apparatus for forming a pipe from a sheet metal plate
CA 2049293 C · Owner: Hu-Metal Engineering Pty. Limited · Inventors: Hume, Kenneth Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plate rolling apparatus, for rolling a plate (10) to form a pipe, which comprises a mandrel (11) with a gripper means (14) for engaging an edge of the plate (10) and a mandrel deflection limiting device (20 21 and 22), located to impinge at the upper surface of the mandrel (11) on the plate (10) located on the mandrel (11) during a rolling operation. The deflector limiting device (20 21, and 22) includes at least a pair of movable contact members (20, 21 and 22) and applying a force to the mandrel (11) to prevent or restrict deflection of the mandrel (11) from its centre during operation, the contact members (20, 21, 22) being relatively movable to avoid contact with the gripper means …
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 March 14, 1990 and granted August 7, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 14, 2012.
- 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.