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US20090229261 |
Dual mode hydraulic circuit control and method
A dual mode control system for a hydraulic circuit ( 200 ) having a variable displacement pump ( 216 ) includes at least two actuators, each controlled by a respective valve. The valves are...
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US20090223582 |
APPARATUS FOR FIXING HYDRAULIC PIPES FOR CONSTRUCTION EQUIPMENT
An apparatus for fixing hydraulic pipes for construction equipment is provided, which can facilitate joint connection of return pipes having a large size to a hydraulic tank, in an environment...
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US20090218161 |
Control Valve Assembly for Electro-Hydraulic Steering System
A steering system includes a fluid pump and an electro-hydraulic steering circuit in selective fluid communication with the fluid pump. The electro-hydraulic steering circuit defines a first flow...
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US20090173067 |
HYDRAULIC CONTROL VALVE SYSTEM WITH ISOLATED PRESSURE COMPENSATION
A hydraulic valve assembly includes a pressure compensating valve in which a compensator spool is slideably received in a bore. A pre-compensator gallery connected to a metering orifice, a preload...
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US20090145120 |
METHOD AND CIRCUIT ARRANGEMENT OF THE SUPPLY OF PRESSUE MEDIUM TO AT LEAST TWO HYDRAULIC CONSUMERS
The invention relates to a method and a circuit arrangement for controlling and regulating the supply of pressure medium to at least two hydraulic consumers, which are assigned in each case a...
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US20090094973 |
HYDRAULIC CIRCUIT FOR HEAVY EQUIPMENT
A hydraulic circuit for heavy equipment is disclosed, which utilizes a hydraulic fluid supplied from a hydraulic pump for driving a cooling fan, as a pilot signal pressure, without installing a...
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US20090064674 |
Accumulator
An accumulator for a hydraulic system, wherein the accumulator comprises a liner, a piston and a housing, that defines a pressure chamber, for receiving hydraulic fluid at high pressure, wherein...
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US20080256941 |
HYBRID HYDRAULIC JOYSTICK WITH AN INTEGRAL PRESSURE SENSOR AND AN OUTLET PORT
A user input device is provided for a hydraulic system that has a source of pressurized fluid and a tank. The user input device includes a body with a supply passage for receiving the pressurized...
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US20080250783 |
FLOW CONTINUITY FOR MULTIPLE HYDRAULIC CIRCUITS AND ASSOCIATED METHOD
A hydraulic system comprises a plurality of primary hydraulic circuits and a secondary hydraulic circuit for satisfying flow continuity of the primary hydraulic circuits.
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US20080245064 |
Anti-Saturation Valve Assembly for Load Sensing Hydraulic System
An anti-saturation valve assembly ( 51 ) for use in a hydraulic system having priority ( 17 ) and auxiliary ( 25 ) load circuits, the priority circuit providing a priority load signal ( 19 ). The...
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US20080202111 |
LOAD SENSE BOOST DEVICE
A vehicle is disclosed having a hydraulic system. The hydraulic system includes a pressure regulator that maintains the output pressure from a hydraulic pump above a predetermined minimum pressure.
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US20080127642 |
Hydraulic system with variable standby pressure
A hydraulic system is disclosed. The hydraulic system includes a source of pressurized fluid, a low pressure source, and a plurality of actuators. The hydraulic system also includes a plurality of...
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US20080104952 |
Hydraulic Circuit
A hydraulic circuit 100 having a simple structure can recover energy of fluid. Hydraulic circuit 100 comprises a boom cylinder 22, a hydraulic pump 31, a motion switchover valve 32, a...
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US20080034746 |
Combiner valve control system and method
A hydraulic control system for a machine is disclosed. The hydraulic control system may have a first fluid actuator, a first pump configured to produce a first stream of pressurized fluid, a second...
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