Flow dams in labyrinth seals to improve rotor stability
CA 1317613 C · Owner: Lebreton, Albert Frederick · Inventors: Lebreton, Albert Frederick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
16 53,875, Abstract of the Disclosure, Methods and apparatus for preventing swirl in a steam turbine having an annular- shaped stationary portion through which extends in regions of differential pressure a rotatable shaft include flow dams situated perpendicularly with respect to a plurality of spaced-apart annular teeth which extend radially inward from the stationary portion toward the shaft to within close proximity thereof each adjacent pair of teeth forming a cavity there between By damming the cavities a circumferential steam flow is substantially minimized thereby preventing the conditions necessary for the inducement of swirl.
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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 11, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 11, 2010.
- 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.