Gear pump including an inner rotor having a plurality of teeth
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United States of America Patent
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Feb 28, 2017
Grant Date -
Aug 6, 2015
app pub date -
Aug 28, 2013
filing date -
Aug 28, 2012
priority date (Note) -
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status (Latency Note)
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Abstract
In a gear pump, an outer inner wall surface of a suction port which is located on a downstream side in a rotor rotation direction, that is, a first inner wall surface, is located inward of a bottom land between internal teeth of an outer rotor, and the suction port has a shallow portion extended inward from the first inner wall surface on the downstream side in the rotor rotation direction, and a deep portion that is formed so as to be continuous with the shallow portion and that is deeper than the shallow portion. Communication between an inter-tooth chamber and the suction port is cut off with the inter-tooth chamber facing only the shallow portion.
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