Rotary positive-displacement scavenging device for rotary vane pumping machine
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United States of America Patent
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Jun 12, 2001
Grant Date -
N/A
app pub date -
Apr 30, 1999
filing date -
Apr 30, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A rotary vane pumping machine includes a stator and rotor in relative rotation. The rotor has a plurality of radial vanes slots and each one of a corresponding plurality of vanes slides within a radial vane slot of the rotor. Each pair of adjacent vanes defines a vane cell. A rotary scavenging disk is disposed along the stator circumference, and is sized such that the rotary scavenging disk extends into the vane cell. An outer circumferential edge of the rotary scavenging disk is in sealing proximity with an outer circumferential edge of the rotor and recesses within the rotary scavenging disk mesh and seal with the extending and retracting vanes.
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