KIDNEY PORT CONFIGURATIONS IN PORT PLATES FOR BALANCED VANES
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United States of America Patent
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Issued Date -
Mar 27, 2025
app pub date -
Sep 22, 2023
filing date -
Sep 22, 2023
priority date (Note) -
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status (Latency Note)
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Abstract
A vane pump system includes a kidney port plate engaged at an axial end of a rotor and liner. The port kidney plate includes an over vane inlet port configured to be circumferentially aligned with an inlet arc segment of a circumferential cam surface of the liner for ingress of fluid to a plurality of vanes, and an over vane discharge port configured to be circumferentially aligned with a discharge arc segment of the circumferential cam surface for discharging pressurized fluid from the plurality of vanes. The kidney port plate includes at least six kidney ports radially inward from the over vane inlet port and the over vane discharge port. The kidney ports are circumferentially spaced apart from one another. The kidney ports are configured to be radially aligned with vane slots of the rotor for pressure balancing across over vane and under vane ends of the plurality of vanes.
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