Handling or laying pipes
CA 2074415 C · Owner: Moore, David · Inventors: Moore, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pipe handling and laying apparatus 1 supports a pipe on holding and support means 2,3 and includes extendible and retractable gripping means 4 having gripping head 4a. The pipe supported generally within area A, is brought in end-to-end relationship with another pipe to be joined thereto. Gripper head 4a is introduced into the open end of the second pipe and ram piston P of hydraulic ram H is retracted causing legs L of gripper head 4 to pivot into extended positions to grip the interior wall of the second pipe by means of gripper feet F. Further retraction of ram piston P pulls the first pipe into close relationship with the second.
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 July 22, 1992 and granted September 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 22, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 22, 2014.
- 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.