Patent ID: 6363918
Filing Date: 2002-04-02
Classification: F01P,F02M,F04C,F04D

Abstract:
A pump arrangement comprising:a housing; a first pumping chamber within said housing, said first pumping chamber connectable to a first liquid transport circuit; a drive shaft carried by said housing; a first pumping means arranged for rotation within said first pumping chamber, said first pumping means being driven by said drive shaft; a second pumping chamber separated from said first pumping chamber by said housing such that said housing forms a common separation wall, said second pumping chamber connectable to a second liquid transport circuit, said second pumping chamber accommodating second pumping means being driven by said drive shaft; wherein said second pumping means is driven by said drive shaft via a magnetic coupling, said coupling comprising a driver rotor connected to said drive shaft and a driven rotor carried by said housing, said driven rotor driving said second pumping means, said driver rotor and said driven rotor being separated by a separation wall assembly serving as a static seal to hermetically seal the second pumping chamber from said drive shaft.