Hydraulic drive with rapid stroke and load stroke
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United States of America Patent
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Feb 27, 2018
Grant Date -
Mar 24, 2016
app pub date -
Sep 17, 2015
filing date -
Sep 19, 2014
priority date (Note) -
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Abstract
A hydraulic drive including at least one hydraulic cylinder that includes a piston chamber, an annulus and a piston that separates the piston chamber from the annulus. The hydraulic drive further includes a first hydraulic pump that has a pump intake and a pump outlet, a directional control valve that has a first and a second switching position, and a second hydraulic pump. The second hydraulic pump has a direction of delivery that is consistent with the direction of delivery of the first hydraulic pump at the pump outlet, wherein the second hydraulic pump in the first switching position of the directional control valve is hydraulically connected with the piston chamber and the second hydraulic pump in the second switching position of the directional control valve is not hydraulically connected with the piston chamber.
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