ROTARY PUMP AND BRAKE DEVICE HAVING THE SAME
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United States of America Patent
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N/A
Issued Date -
Jun 26, 2014
app pub date -
Dec 19, 2013
filing date -
Dec 25, 2012
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A rotary pump includes a first side plate and a second side plate between which an outer rotor and an inner rotor are arranged. The second side plate has a concave portion on a surface adjacent to a maximum gap portion relative to a drive shaft. The concave portion is located in an outer teeth passing section which is defined between a line on which a teeth tip of an outer teeth part of the inner rotor passes in response to rotation of the inner rotor and a line on which a teeth bottom of the outer teeth part of the inner rotor passes in response to rotation of the inner rotor. The concave portion communicates with one of a plurality of gap portions while the inner rotor is rotated.
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