Apparatus for testing the gas-tightness of joints between hollow bodies
CA 1312745 C · Owner: Weatherford Oil Tool Gmbh · Inventors: Jansch, Manfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to an apparatus for testing the gas-tightness of joints between hollow bodies, for example, pipes.With the apparatus a test, space with two concentric chambers of variable sizes is formed. The outer one is filled with a gaseous test medium and the inner one with an incompressible pressurized medium. It is thereby possible to reduce substantially the quantity of the gaseous test medium. The safety of the entire apparatus is improved extraordinarily.
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
- Granted January 19, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 19, 2010.
- 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.