Hydraulic control arrangement

Details Hydraulic control arrangement Hydraulic control arrangement

2005-09-06

2005-09-06

Lazo, Thomas E. (Department: 3745)

Power plants

Pressure fluid source and motor

With control means for structure storing work driving energy

C060S469000

Reexamination Certificate

active

06938413

ABSTRACT:
There is disclosed a hydraulic control arrangement for damping driving vibrations of a mobile machine, comprising a lifting cylinder supporting a working tool whose cylinder chambers can be connected to a fluid source or a tank via a control valve arrangement. The hydraulic control arrangement has a damping valve arrangement including a control valve in which a check valve is integrated through which a bottom-side chamber of the lifting cylinder is connectable to a hydraulic accumulator. In the pressure control function the accumulator can be connected to a tank so that the accumulator pressure is restricted to a maximum value.

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patent: 5802847 (1998-09-01), Harnischfeger
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patent: 6167701 (2001-01-01), Hatcher et al.
patent: 6321534 (2001-11-01), A'Hearn et al.
patent: 6357230 (2002-03-01), A'Hearn et al.
patent: A 08-277548 (1996-10-01), None
patent: 1270241 (1986-11-01), None

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