Self-energized gasket and manufacturing method therefor
CA 2558415 C · Owner: Flowserve Management Company · Inventors: Grace, Ronald L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A secondary seal gasket (65) is formed of a graphite material for higher temperature applications. The gasket is formed by multiple wraps of a graphite ribbon and then is shaped in a mold to provide a U shaped cross-sectional configuration having a self-energizing spring (71) disposed therein. The gasket is formed from an L shaped ribbon wrap (130) having additional ribbon overwraps (152) thereon to define a gasket ring which is then molded in a die press (160) to form the U shape. The L shaped ribbon wrap thereby extends axially and then radially outwardly to define an end wall (133) (136) of the gasket to impede migration of fluid between the axial ribbon wraps (152).
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 4, 2005 and granted September 4, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 4, 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.