Production process for a sealing ring
CA 1270360 C · Owner: Sponagel, Stefan · Inventors: Sponagel, Stefan; Graf, Gunter; Gross, Heinz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for producing a sealing ring with a sealing lip in which the, sealing ring is first produced in the form of a tube by extrusion and, simultaneously provided with hydrodynamically effective return elements. The tube that is so obtained is hardened and cut into sections that are of a length that is suitable for forming tube-like sleeves. These are widened in a radial direction so as to form a flange at their front ends and are then, secured by means of the flange in the stiffening ring of the sealing ring that accomodates them.
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 June 19, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 19, 2007.
- 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.