Excavating – Ditcher – Condition responsive
Reexamination Certificate
2007-01-30
2007-01-30
Petravick, Meredith (Department: 3671)
Excavating
Ditcher
Condition responsive
C091S032000
Reexamination Certificate
active
10796846
ABSTRACT:
The invention concerns a driving device, particularly a lifting device for a working vehicle, with a hydraulic drive, in the form of a motor with a first connection and a second connection, a pump, a control valve arrangement between the pump and the drive, and an operating device with at least one operating element with a setting area, with which at least one parameter of the drive can be set. It is endeavoured to provide a simple manner of extending the functionality of the lifting device. For this purpose, it is ensured that the control valve arrangement is optionally controlling the drive to be single-acting or double-acting and the setting area has a first section, in which the drive is controlled to be single-acting and a second section, in which the drive is controlled to be double-acting.
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patent: 4622886 (1986-11-01), Imada et al.
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patent: 2002/0083825 (2002-07-01), Kusuyama
patent: 2004/0177749 (2004-09-01), Joergensen
patent: 3522823 (1987-01-01), None
patent: 0 838 140 (1998-04-01), None
McCormick Paulding & Huber LLP
Petravick Meredith
Sauer-Danfoss (Nordborg) A/S
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