Radial hydraulic pump with a variable eccentricity and delivery
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United States of America Patent
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Nov 24, 2015
Grant Date -
Apr 25, 2013
app pub date -
Oct 18, 2012
filing date -
Oct 21, 2011
priority date (Note) -
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Abstract
The disclosure of the present invention describes a hydraulic pump including a frame, a pump shaft capable of being rotated by a thermal or electric motor around an axis which is stationary with respect to the frame, an eccentric sleeve engaged with the pump shaft, at least one stage of pistons arranged to be stationary with respect to the frame and radially extending in pump cylinders defining chambers, and at least one tappet extending in a housing made in the eccentric sleeve and cooperating with at least one resilient means, having a resilience varying according to the load of the downstream circuit emerging at the level of the pump chambers, the tappet actuating means which decrease the piston stroke.
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