Knife gate valve having elastomeric seals
CA 2560666 C · Owner: Vanderberg, Christopher Allen · Inventors: Reeves, Shaine Gordon; Vanderberg, Christopher Allen; Comstock, John Paul
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gate seal (52) for a knife gate valve comprising a sealing surface lining the gate channel and an integral gasket for compression between valve body halves, a chest seal (54) for a knife gate valve comprising a body having an expandable sealing surface and one or more injection chambers (60) adapted to receive an injectable packing, each chamber having a cross-sectional area that is completely surrounded by the body member and/or a knife gate valve , comprising one or both such seals. The chest seal body may comprise a knife gate slot (56) that is peripherally surrounded by the body. The gate seal (52) and the chest seal (54) may comprise a single integral elastomeric member or …
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 March 24, 2005 and granted December 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.