Refractory stator/rotor unit for a valve at the outlet of a vessel containing metal melt
CA 1340564 C · Owner: Keller, Werner · Inventors: Keller, Werner; Waltenspuhl, Rolf
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The refractory stator/rotor unit for a valve at the outlet of a vessel (11) containing a metal melt comprises a stator (15) secured in the vessel wall (14) and a rotor (16) in it which is rotatable from the underside of the vessel floor (11') to open and close the valve. The unit projecting into the vessel has transverse openings (17,18) extending in it and a discharge opening (19') starting from them leading out of the vessel. Provided between the rotor (16) and the stator (15) in the entire region within the vessel there is a cylindrical sealing surface (20) which surrounds the transverse openings (17,18) whilst provided in the region within the vessel wall (14) there is a clearance (22), …
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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 May 25, 1999. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 25, 2016.
- 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.