Flow control apparatus for heavy construction equipment

Details Flow control apparatus for heavy construction equipment Flow control apparatus for heavy construction equipment

2011-08-02

2011-08-02

Leslie, Michael (Department: 3745)

Motors: expansible chamber type

With motive fluid valve

Relatively movable serial valves

Reexamination Certificate

active

07987764

ABSTRACT:
A flow control apparatus for heavy construction equipment is provided, which can prevent overspeed and abrupt operations of an actuator due to an excessive flow rate during an initial operation of the actuator when a composite work is performed by simultaneously operating an option device and another actuator, and can prevent the cut-off of hydraulic fluid supply to the option device due to an operation inability of a flow control valve when leakage of the hydraulic fluid occurs due to the increase of the temperature of the hydraulic fluid.

REFERENCES:
patent: 6691510 (2004-02-01), Kariya et al.
patent: 6742438 (2004-06-01), Kim
patent: 6907815 (2005-06-01), Kim
patent: 7162946 (2007-01-01), Jeon
patent: 7380489 (2008-06-01), Jeon

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