| 摘要 |
<p>A disposable biomedical rotating filtration system, for processing fluids in a closed environment includes a rotor (20) mounted for rotation on a pivot pin (29), a seal (44) between the rotor (26) and the pivot pin (29), and external permanent magnet drive mechanism (36) and a star shape drive element (34) mounted on the rotor (20) for rotating the rotor (20) in response to a magnetic field induced by the permanent magnet (38) of drive mechanism (36). The drive element (34) on the rotor (20) is stamped from an inexpensive non-permanent ferromagnetic sheet metal and has a configuration and position in relation to the center of said magnetic field such that said drive element (34) receives sufficient torque for driving said rotor (20) and sufficient seal force is applied on the rotor (20) to provide a fluid tight seal between the rotating rotor (20) and the seal (44). The pivot pin (29) is molded from a hard plastic material such as a polyamide base resin having a low coefficient of friction and good lubriciousness. The pivot pin (29) is irradiated by gamma radiation for sterilization and modifying of the plastic material without degradation or loss of lubricious properties.</p> |
