Patent ID: 6659720
Filing Date: 2003-12-09
Classification: F04D,F05B,F16C,F16J,F16N

Abstract:
A centrifugal pump for pumping a fluid to be pumped, the centrifugal pump comprising:a motor; a fluid pumping impeller; a shaft disposed between said motor and said impeller so that said motor can drive or rotate said shaft and said impeller; a first seal having an annular rotating sealing member affixed to said shaft for rotation therewith and an annular stationary sealing member, said rotating and stationary sealing members working together to form a fluid sealing interface therebetween; an approximately C-shaped annular sealing member having first and second flexible sealing legs spaced from one another; and an annular spring disposed between said first and second legs for biasing said first and second legs away from one another into respective sealing positions.