Machined shaft seal encased in an elastomeric sleeve
CA 2176751 C · Owner: Laflin, William Q. · Inventors: Smith, Stanley N.; Laflin, William Q.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A manually assembled shaft seal assembly includes plastic sealing element having an annular tubular mounting portion and a shaft-engaging sealing lip. An annular elastomeric sleeve extends around the inner and outer surfaces of the tubular mounting portion to provide a resilient mounting mechanism for the shaft seal assembly. During service at high operating temperatures the elastomeric sleeve absorbs and accommodates stresses generated m the plastic tubular portion of the sealing element by thermal expansion The elastomeric sleeve is in a compressed condition when mounted within a shaft seal housing so that it can expand slightly if necessary, to compensate for shrinkage or creep in the …
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 November 30, 1994 and granted April 16, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 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.