| 摘要 |
This invention relates to a porting system for a hydraulic device comprising a housing having a chamber communicating with an intake port and an exhaust port; a pair of rotary gears disposed internally of said chamber adjacent said ports and defining expanding and contracting pockets as said gears rotate over said intake and exhaust ports; said ports having a cross-sectional area in the direction perpendicular to the rotation which varies in relation to the rate of change of the expanding and contracting pockets.
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