Electrohydraulic drawing press cushion drive
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United States of America Patent
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Issued Date -
Jun 19, 2008
app pub date -
Dec 1, 2007
filing date -
Dec 13, 2006
priority date (Note) -
Abandoned
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Abstract
In an electrohydraulic drawing press drive, particularly an electrohydraulic drawing cushion drive including a hydraulic circuit with at least one motor which is operable as a drive motor or as a pump and at least one hydraulic pump which is operable as a pump or as a drive motor, an electric drive motor which is also operable as generator is connected to the hydraulic motor in order to drive the hydraulic motor or to be driven thereby and a control unit is provided for controlling at least one of the electric motor and the hydraulic pump.
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