Load sensing hydraulic system

Details Load sensing hydraulic system Load sensing hydraulic system

2006-12-15

2008-10-07

Novosad, Christopher J. (Department: 3641)

Earth working

Automatic power control

C701S050000

Reexamination Certificate

active

07431101

ABSTRACT:
A versatile load sensing hydraulic system capable of being adapted to a variety of possible configurations for vehicle mounted implements such as plow/spreader type vehicles or the like is disclosed. An embodiment of the hydraulic system comprises a reservoir for hydraulic fluid; a load sensitive variable displacement pump for pumping hydraulic fluid from the reservoir; and a plow on/off valve having a pressure port coupled to the pump for receiving hydraulic fluid under pressure. The plow valve includes a manifold having a fluid channel coupled to the plow valve pressure port and further having a number of return ports; one or more on/off valve coupled to the manifold return ports, each valve being adapted to control fluid flow therein to operate a respective component of the plow equipment; and a stroke valve coupled to a manifold return port, the stroke valve being adapted to operate in conjunction with one or more of the on/off valve for providing a load sensing pressure signal to the pump.

REFERENCES:
patent: 7025148 (2006-04-01), Hansen

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