Eccentric pump
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United States of America Patent
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Dec 4, 2012
Grant Date -
Jul 8, 2010
app pub date -
Jun 6, 2008
filing date -
Jun 18, 2007
priority date (Note) -
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Abstract
The invention relates to an eccentric pump including a frame, a pump shaft which can be driven using a driving device and is mounted to be rotatable about a main axis that is stationary relative to the frame, an eccentric sleeve which is mounted in an axially movable manner on a pump shaft section, an anti-rotation element which is effective between the pump shaft section and the eccentric sleeve), several pump elements which are stationary relative to the frame and are provided with displacement elements that can be moved in a radial direction relative to the main axis, act upon a fluid contained in swept volumes of the pump elements, and are moved against a fluid pressure by an external surface of the eccentric sleeve, and at least one spring element which acts upon the eccentric sleeve in an axial direction.
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