Patent ID: 6626578
Filing Date: 2003-09-30
Classification: F16C

Abstract:
A rotary pump for liquid comprising: a housing, a shaft carrying a motor rotor, a motor stator fixed in said housing and surrounding said rotor to rotate said rotor and shaft about an axis, said shaft being mounted in said housing by axially spaced conical bearings, each bearing including a first element fixed on said shaft with a first conical bearing surface concentric with said axis and a second element carried by said housing with a second conical bearing surface concentric with said axis and slidably engaging said first bearing surface, a biasing element forcing at least one of said second elements toward said other second element in an axial direction to compensate for wear between said surfaces, and a wear indicator comprising a first permanent magnet on said at least one second element, a movable follower mounted on said housing with a second permanent magnet facing said first permanent magnet and movable by said first permanent magnet, said follower having an indicator element movable into a position indicating the axial position of said second permanent magnet.