Hydraulic arrangement

Power plants – Pressure fluid source and motor – With control means for structure storing work driving energy

Reexamination Certificate

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Details

C060S469000

Reexamination Certificate

active

07140178

ABSTRACT:
A hydraulic arrangement is provided, including: a hydraulic cylinder that is provided with a first and a second chamber, a hydraulic reservoir, a hydraulic fluid feeder conveying hydraulic fluid, a hydraulic accumulator, a hydraulic line arranged between the hydraulic accumulator and the first chamber, a control valve arranged in the hydraulic line, a first supply line for the first chamber, a second supply line for the second chamber, and a controller with a lifting position, a lowering position, a neutral position, and a spring support position for controlling the hydraulic cylinder. The second supply line is fluidly connected to the hydraulic reservoir and the first and second supply lines are substantially prevented from being fluidly connected to the hydraulic fluid feeder when the controller is in the spring support position.

REFERENCES:
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patent: 5513491 (1996-05-01), Broenner et al.
patent: 5992146 (1999-11-01), Hausman
patent: 6382326 (2002-05-01), Goins et al.
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patent: WO 90/05814 (1988-11-01), None
Patent Abstracts of Japan, Bd. 013, Nr. 060 (M-796), Feb. 10, 1989 & JP 63 265023 A, Nov. 1, 1988.

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