Blade control system for an earthmoving blade

Details Blade control system for an earthmoving blade Blade control system for an earthmoving blade

1996-09-06

1997-11-04

Melius, Terry Lee

Earth working

Mounting for pushed tool at end of motor vehicle

Transversely mounted blade

172804, 91413, C02F 376, E02F 385

Patent

active

056829558

ABSTRACT:
A blade control system includes a directional control valve, a fluid regeneration valve and a selector valve for selectively controlling fluid flow between a pump and first and second hydraulic cylinders and between the cylinders. With the valves positioned at preselected operative positions, pressurized fluid from the pump is directed to the head end chamber of the first cylinder, fluid expelled from the rod end chamber of the first cylinder is diverted to the head end chamber of the second cylinder, and fluid expelled from the rod end chamber of the second cylinder is combined with the fluid being directed to the head end chamber of the first cylinders to provide two stages of fluid regeneration for increasing the extension speed of the cylinder.

REFERENCES:
patent: 3654835 (1972-04-01), Sievenpiper
patent: 3705631 (1972-12-01), Seaberg
patent: 4397221 (1983-08-01), Friesen et al.
patent: 4635532 (1987-01-01), Tanino et al.
patent: 4802537 (1989-02-01), Ryerson
patent: 5062349 (1991-11-01), Khan
patent: 5251705 (1993-10-01), Waggoner et al.
patent: 5370038 (1994-12-01), Poppe et al.

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