ATBECHDEDKESFRGBGRITLILUNLSEMCPTIESILTLVFIROMKCYALTR............................JDIM350 (Ver 2.1 Jan 2001) 1620000/01201931EUROPEAN PATENT APPLICATIONA320050608EP01204014.320011022EnEnEnMI00229020001023IT20050608200523200205022002187 7F 04D 29/04 AdeGleitlager für eine KreiselpumpeenSliding-contact bearing for a centrifugal pumpfrPalier à glissement pour une pompe centrifuge1TM.P. S.p.A. Termomeccanica Pompe03141580FILE 83986Pompe, TM.P. S.p.A. TermomeccanicaVia del Molo 319126 La SpeziaITGaribotti, EdoardoVia del Molo 319126 La SpeziaITDe Gregori, Antonellaet al00087231Ing. Barzano' & Zanardo Milano S.p.A. Via Borgonuovo 1020121 MilanoITATBECHCYDEDKESFIFRGBGRIEITLILUMCNLPTSETRALLTLVMKROSI20050608200523

A protection device (20) for centrifugal pumps with a vertical axis, where the aforementioned pump comprises a case (5) containing a shaft (21), with the pump also comprising an impeller (3) connected to said shaft (21) and free to rotate inside said case (5). The device (20) comprises a first ring (1), mobile in rotation with the impeller (3) and a second ring (2), in a fixed position with respect to the case (5), in such a way that the sliding contact between the aforementioned first and second ring (1, 2) allows the dry operation of the centrifugal pump.