Method of securing a cover to the end of a thin- walled tube
CA 1263520 C · Owner: Machinefabriek En Technische Handelsonderneming M. H. Van Der Graaf B.V. · Inventors: Van Der Graaf, Meine Hendricus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of securing a cover to the end of a thin-walled tube using a flange. According to the invention the flange is slidably disposed in the tube and is restrained from being pulled out of the tube by a resilient ring accommodated in a shallow groove in the inner wall of the tube. The ring is maintained in position by a supporting edge of the cover or, alternatively by bolts dis-, posed closely to the circumferential edge of the cover to secure, the cover to the flange.
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 December 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 5, 2006.
- 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.