Regenerative turbine flow inducer for double or tandem mechanical seals
CA 2108376 C · Owner: Sieghartner, Leonard J. · Inventors: Sieghartner, Leonard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A regenerative turbine flow inducer (11) for moving lubricating fluid through a seal chamber of a bearing assembly for lubricating eating surfaces includes a turbine impeller (41) rotated by a shaft (20) and a pair of liners (42, 43) which enclose the impeller, the liners defining fluid inlets on both sides of the impeller which are communicated with a sours of lubricating fluid and a fluid discharge outlet (18), the liners containing lubrication fluid supplied thereto and directing the fluid to the impeller as the impeller is rotated, drawing lubrication fluid through the liners. The regenerative turbine flow inducer may be used with double or tandem mechanical seals.
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 April 21, 1992 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2014.
- 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.