Packing gland
CA 2085662 A1 · Owner: Laing, Wilfred J. · Inventors: Laing, Wilfred J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The packing gland is used to seal the high pressure fluid end of a reciprocating plunger. The gland consists of two members which are threadably interconnected and which have longitudinally extending and axially aligned bores within which the plunger reciprocates. An annular recess is formed in the wall of the bore and a seal is accommodated within the recess. Rotation of one member relative to the other causes the seal to expand radially inwardly into contact with the plunger.
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 December 17, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 17, 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.