A fluid pressure circuit for controlling a rod of a cylinder controlled in accordance with an operation command includes a tank, a fluid pressure actuator configured to pressurize fluid supplied from the tank for extending and retracting the cylinder, a flow control valve arranged between the fluid pressure actuator and the cylinder device configured to switch a flow passage of pressurized fluid and discharge via a first throttle return fluid from the cylinder, a variable regeneration switching valve configured to discharge return fluid from the cylinder to the flow control valve upon non-regeneration and upon regeneration, branch part of the return fluid and discharge via a second throttle the fluid branched, a regenerative motor configured for regeneration by fluid branched by the variable regeneration switching valve, and a third throttle connected in series with the first throttle upon the regeneration to limit flow of return fluid.

A hydraulic system for a machine includes a first pump, an implement pump, a control valve, and an auxiliary circuit. The first pump is configured to supply a first fluid flow to a first circuit, such as a steering circuit. The implement pump is configured to supply a second fluid flow to an implement circuit to actuate a primary implement function. The auxiliary circuit is configured to deliver fluid flow to actuate an auxiliary implement function. The auxiliary circuit is fluidly coupled to the implement circuit. The auxiliary circuit is also coupled to the first circuit by the control valve. The control valve is located downstream, in the direction of fluid flow, of the implement pump and the first pump. The control valve is configured to allow at least a portion of the first fluid flow to enter the auxiliary circuit and be delivered to the auxiliary implement function.

An open center (OC)-open center load sense (OCLS) conversion valve and hydraulic circuits therewith configured to control flow from a hydraulic pump to multiple hydraulic functions. The conversion valve includes cartridge, load sense, pump, first function supply, first function return, and downstream ports. When an OC cartridge is inserted in the cartridge port, regardless of load sense, the pump and first function supply ports are connected and the first function return and downstream ports are connected. When an OCLS cartridge is inserted in the cartridge port and load sense is detected, the pump and first function supply ports are connected and the first function return and downstream ports are connected. When an OCLS cartridge is inserted in the cartridge port and load sense is not detected, the pump, first function return and downstream ports are connected.

A hydraulic apparatus for a construction equipment, such as an excavator, comprising a support structure connected or connectable to a movable arm of the construction equipment and a pair or rotating drums comprising a plurality of teeth, a pair of hydraulic motors, each arranged for the movement of a particular drum, and a rotating flow divider device. The flow divider device comprises at least one inlet for receiving a supply of operative fluid provided by the construction equipment and a pair of outlets which provide the operative fluid, which is suitably divided, to the pair of hydraulic motors.

A dual mode control system for a work vehicle includes a hydraulic system configured to drive a loader assembly and a dozer assembly coupled to the work vehicle. The hydraulic system includes a fluid delivery system comprising a plurality of flow paths fluidly coupled to a hydraulic pump. The hydraulic system includes a valve assembly configured to regulate diversion of fluid into a first and a second hydraulic cylinders coupled to the fluid delivery system to adjust the loader assembly, or into a third cylinder coupled to the fluid delivery system to adjust the dozer assembly. The dual mode control system also includes a controller operably coupled to the valve assembly, and one or more user interfaces coupled to the controller to enable an operator to provide inputs to cause the controller to adjust the valve assembly, and to thereby adjust the loader assembly or the dozer assembly.

A Hydraulic Manifold Control Assembly for use in connection with surface blowout preventers and diverter control systems. Said Hydraulic Manifold Control Assembly incorporates design elements and methods which reduce overall envelope dimensions, improving maintenance accessibility, thereby reducing overall installation and manufacturing time and ultimately contributing to a more robust, cost effective end-product. Said design elements and methods include: the use of intrinsically safe I/O modules and components; the employment of a removable valve assembly rack installation method; the use of a removable face plate for identification of flow control valves; the implementation of a digital automatic diverter sequence; the use of integrated manifold assemblies; and the integration of a wide-range function count.

A hydraulic system embodying a method for combining two or more hydraulic functions from operatively associated distributor valves to selectively increase fluid flow using only hydraulic switches and valves is provided. Each two or more preselected hydraulic functions may each have a piloted diverter valve operatively associated with the other(s) so that when a control valve of the first hydraulic function is selectively positioned to a maximum pressure the first diverter valve actuates the second (and other) diverter valve(s) to couple to the first hydraulic function. Solving the problem where a user has two hydraulic flows that are limited by the diameter/distance of the hoses or pipes to a maximum flow rate almost regardless of pressure but needs to increase that flow to efficiently perform a task.

A hydraulic valve unit includes a main oil passage configured to bring a side of a master cylinder and a side of a slave cylinder to communicate with each other, and a bypass oil passage configured to bypass a valve mechanism of the main oil passage, wherein the main oil passage and a main section of the bypass oil passage are disposed to be arranged with respective axes aligned with each other, and the main section of the bypass oil passage is disposed at the same height as the main oil passage or at a position higher than that of the main oil passage in a state in which a valve body is attached at a predetermined attachment position.

A dual mode control system for a work vehicle includes a hydraulic system configured to drive a loader assembly and a dozer assembly coupled to the work vehicle. The hydraulic system includes a fluid delivery system comprising a plurality of flow paths fluidly coupled to a hydraulic pump. The hydraulic system includes a valve assembly configured to regulate diversion of fluid into a first and a second hydraulic cylinders coupled to the fluid delivery system to adjust the loader assembly, or into a third cylinder coupled to the fluid delivery system to adjust the dozer assembly. The dual mode control system also includes a controller operably coupled to the valve assembly, and one or more user interfaces coupled to the controller to enable an operator to provide inputs to cause the controller to adjust the valve assembly, and to thereby adjust the loader assembly or the dozer assembly.

A hydraulic block includes multiple pairs of actuator ports connectable to a hydraulic actuator and a discharge oil passage for discharging work oil returned from the hydraulic actuator to the outside. The charge oil passage includes a first oil passage corresponding to a predetermined actuator port of all the actuator ports and a second oil passage corresponding to non-predetermined actuator ports other than the predetermined actuator ports. The first oil passage is disposed in parallel with the second oil passage.