Variable displacement vane pump
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United States of America Patent
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Jan 30, 2018
Grant Date -
Jan 14, 2016
app pub date -
Feb 5, 2014
filing date -
Feb 22, 2013
priority date (Note) -
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status (Latency Note)
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Abstract
A vane pump includes a rotor, vanes, pump chambers, a suction port, and a discharge port. The side member has a first transition section and a second transition section. The first transition section is a section from an end point of the suction port to a start point of the discharge port. The second transition section is a section from an end point of the discharge port to a start point of the suction port. An angle between the start point and the end point of the suction port is set such that a pressurizing timing is offset from a depressurizing timing. The pressurizing timing is a timing at which one pump chamber starts to communicate with the discharge port from the first transition section, and the depressurizing timing is a timing at which another pump chamber starts to communicate with the suction port from the second transition section.
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