The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 02, 1984
Filed:
Nov. 18, 1981
Jean-Yves Marsac, Lyons, FR;
Lucien Balzano, Jouars Pontchartrain, FR;
Marc Lepretre, Bois Colombes, FR;
Sereg, S.A., Montrouge, FR;
Bertin & Cie, S.A., Plaisir, FR;
Abstract
The invention relates to a method and an apparatus for extracting packing rings from a stuffing-box, for example in a pump, a compressor or a valve. An object of the invention is to allow easy and quick extraction of the rings even when the access to the rings is not convenient. After opening the stuffing-box, a nozzle 39 of reduced dimension, carried by an arm 38 linked to a high pressure water supply, the pressure being of the order of 800 bars, is located above the first ring 32, approximately at the middle of its width; the arm is maintained by a fastening means 42 to the yoke of the valve. The water jet bores a hole in at least the first ring, which eliminates its internal mechanical stress and the water flowing through the hole is pushed back by the next ring, and lifts the first ring out of its housing.