Gland pack for reciprocating machines operating at high pressure
CA 1136668 A · Owner: Nuovopignone - Industrie Meccaniche E Fonderia S.P.A. · Inventors: Giacomelli, Enzo; Traversari, Alessandro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Case 1249 -, IMPROVED GLAND PACK FOR RECIPROCATING MACHINES OPERATING AT HIGH PRESSURE, ABSTRACT OF THE DISCLOSURE A gland pack for reciprocating plunger machines operating at high pressure, comprising three-element seal assemblies housed in cavities at the head end of the pack each element, comprising a seal ring constructed of a self-lubricating plastics material and in the form of a number of pseudotangentially cut segments held together by a circumferential spring, which is coaxially sandwiched between two metal anti-extrusion rings which, when subjected to the high differential pressure of the working fluid reduce their, diameter until they approach the outer surface of the plunger but …
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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 November 30, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 30, 1999.
- 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.