Abstract: A check valve is provided for use with variable frequency drives and other applications. In one aspect, the check valve provides a poppet guided by a poppet guide in at least two locations to ensure stability between fully open and fully closed positions. In another aspect, the check valve includes a poppet guide adapted to receive a poppet in a stem receiving channel, the stem receiving channel including guide vanes engaging the poppet and auxilliary channels for self cleaning.

Abstract: A check valve is provided for use with variable frequency drives and other applications. In one aspect, the check valve provides a poppet guided by a poppet guide in at least two locations to ensure stability between fully open and fully closed positions. In another aspect, the check valve includes a poppet guide adapted to receive a poppet in a stem receiving channel, the stem receiving channel including guide vanes engaging the poppet and auxiliary channels for self cleaning. The check valve may also include a valve seal. In one embodiment, the valve seal is an o-ring received by a poppet head, based of the poppet guide and valve seat. The valve seat and/or the base may include expansion channels to receive a portion of the valve seat during compression when the check valve is in a closed position.

Abstract: A method and a device for controlling a load sensing hydraulic system, having a bypass valve (F), which is controlled by a pump pressure (P) and which when the hydraulic system is in operation diverts a pump flow of hydraulic fluid to a tank (E). The bypass valve (F) is pre-stressed towards a closed position and is put on load by the pump pressure (P) towards an open position against the action of the pre-stress. When the hydraulic system operates in a idling operation a first pre-stress element (I) limits the pre-stress to a first pressure and upon activation of the hydraulic system, a pressure regulator (10) increases the pre-stress to a second, substantially higher pressure by applying a hydraulic, constant second pre-stress force, that is added to the first pre-stress force and is substantially greater than this.

Abstract: A back pressure valve comprises a pressure regulator housing affixed to a pressure controller housing and a diaphragm disposed between the pressure regulator housing and the pressure controller housing. In one aspect, the back pressure valve includes a valve member moveable between a fully open position and a fully closed position. The pressure regulator housing includes an inlet chamber communicating with an outlet chamber through at least one fluid passage in a sleeve. The valve member includes a stem connected to a valve head. The valve head includes an outer surface that is received and guided during movement by an inner surface of the sleeve. The outer surface of the valve head includes an upper outer surface and a lower outer surface separated by a cavity adapted to receive a sealing element. Upper and lower outer surface of the valve head provide stability to the valve member during opening and closing of the back pressure valve.

Abstract: A valve arrangement is provided for selectively connecting a source of fluid pressure to a consumer in order to actuate the consumer in a predetermined direction. The valve arrangement utilizes a valve cone arranged in the valve body which connects the valve ports with each other when the valve cone is in its open position, and is actuated by a holding force which is greater than the force acting on the pressurized fluid side of the valve cone and dependent on the medium pressure in the input port.

Abstract: A hydraulic load control valve (10) accommodated between a hand valve (H) and a hydraulic engine (D) has got at least one proportional load control valve (E), controlled by the pump pressure independent of the flow of hydraulic fluid to the engine. The flow to the engine (D) flows via a non-return valve (12), that is prestressed to open at a pump pressure above the upper limit before a given pressure interval, within which the load control valve (E) is adjusted between completely closed and completely open position of the pump pressure.

Abstract: A check valve is provided for use with variable frequency drives and other applications. In one aspect, the check valve provides a poppet guided by a poppet guide in at least two locations to ensure stability between fully open and fully closed positions. In another aspect, the check valve includes a poppet guide adapted to receive a poppet in a stem receiving channel, the stem receiving channel including guide vanes engaging the poppet and auxilliary channels for self cleaning.

Abstract: A Hydraulic valve device includes a first engine port and a second engine port to a double acting hydraulic motor, and a pump, a hand valve, which is arranged such that it connects the engine ports to the tank and the pump, and which hand valve has two open positions, wherein the pump in the first open position via a line is connected to the first engine port and the tank via a line is connected to the second engine port, and wherein the pump in the second open position via the line is connected to the second engine port and the tank via the line is connected to the first engine port, and a first nonreturn valve, arranged between the pump and the second engine port and opens towards the second engine port.

Abstract: A hydraulic valve device includes a first and a second engine port to a double acting hydraulic motor, a pump, a hand valve which has two open positions, wherein in the first open position the pump is fluidly connected to the first engine port and the tank is fluidly connected to the second engine port; and wherein in the second open position the pump is fluidly connected to the second engine port and the tank is fluidly connected to the first engine port, with a first nonreturn valve, arranged between the pump and second engine port. A piston which by way of the load pressure in the first engine port via a line governs the first nonreturn valve, and a second nonreturn valve arranged, as long as the hand valve is in its first open position, to connect the first engine port to the second engine port.

Abstract: A check valve is provided which may be installed horizontally or in other non-vertical orientations, and used with variable frequency drives and other applications without the valve disk becoming misaligned. In one aspect, the valve provides a housing with an inner surface and a passage, a flange within the housing which divides the housing into upstream and downstream portions, and extending around the inner surface, defining a valve seat and a valve aperture, a poppet positioned in the downstream portion, including a valve disk and a valve stem extending from the valve disk, the valve disk engaging the valve seat, being moveable, and being resiliently biased in the closed position against the valve seat to inhibit fluid flow in a first direction, and a guide removably mounted on the inner surface of the housing, the guide receiving the valve stem of the poppet valve as the poppet valve moves.

Abstract: A check valve is provided capable of reducing the effects of fluid hammer and is easily replaceable and repairable. In one aspect of the invention, a check valve includes a housing with a passage having a check valve positioned therein to permit fluid flow in one direction while preventing fluid flow in the reverse direction. The housing includes an inlet port and a valve seat. The check valve includes a valve disc connected to a stem. The valve disc moves from a closed position engaged with the valve seat to an open position disengaged from the valve seat. The distance traveled by the valve disc away from the valve in a full open position is less than twenty five percent of the diameter of the inlet port.

Abstract: A method and a device for controlling a load sensing hydraulic system, having a bypass valve (F), which is controlled by a pump pressure (P) and which when the hydraulic system is in operation diverts a pump flow of hydraulic fluid to a tank (E). The bypass valve (F) is pre-stressed towards a closed position and is put on load by the pump pressure (P) towards an open position against the action of the pre-stress. When the hydraulic system operates in a idling operation a first pre-stress element (I) limits the pre-stress to a first pressure and upon activation of the hydraulic system, a pressure regulator (10) increases the pre-stress to a second, substantially higher pressure by applying a hydraulic, constant second pre-stress force, that is added to the first pre-stress force and is substantially greater than this.

Abstract: The invention relates to a hydraulic valve device (1) including a high pressure connection (P?) and a low pressure connection (T?); at least one motor port connection (A?) that is connectable to a motor port (A) on a hydraulic motor (M), preferably a hydraulic cylinder; a flow control valve (F), which is arranged between the high pressure connection (P?) and the motor port connection (A?) and which includes a flow opening (18) that is adjustable between a fully closed position and a fully open position; and a pressure regulator (R) that is arranged between the high pressure connection (P?) and the flow regulating valve (F), wherein a regulator pressure (PR) that acts at a first connection point (3) between the pressure regulator (R) and the flow regulating valve (F) acts on the pressure regulator (R) via a first control conduit (4) to close the same.

Abstract: Mobile terminals, methods and computer program products for locating a position of a vehicle on a mobile terminal include identifying a triggering event received by the mobile terminal via a communication link between the mobile terminal and an external device. A geographic location is determined that approximates the position of the vehicle responsive to the triggering event. The information regarding the geographic location that approximates the position of the vehicle is subsequently provided.

Abstract: A speed controller valve system for regulating an opening speed and a closing speed of a pressure reducing valve includes a first inlet couplable to a main valve inlet of a pressure reducing valve. An outlet is couplable to a power chamber of the pressure reducing valve to control a flow of fluid between the outlet and the power chamber to control an opening and/or a closing of the pressure reducing valve. An interior chamber connects the first inlet and the outlet. The chamber receives a resilient member connected to a tapered valve poppet received in the first inlet and moveable in response to a flow of fluid at a pre-set pressure from the main valve inlet to the first inlet. The poppet is located in the chamber and the resilient member includes a resiliency to regulate an amount of movement of the poppet at the pre-set pressure to regulate a flow between the first inlet and the power chamber of the pressure reducing valve.

Abstract: A hydraulic load control valve (10) accommodated between a hand valve (H) and a hydraulic engine (D) has got at least one proportional load control valve (E), controlled by the pump pressure independent of the flow of hydraulic fluid to the engine. The flow to the engine (D) flows via a non-return valve (12), that is prestressed to open at a pump pressure above the upper limit before a given pressure interval, within which the load control valve (E) is adjusted between completely closed and completely open position of the pump pressure.

Abstract: A Hydraulic valve device includes a first engine port and a second engine port to a double acting hydraulic motor, and a pump, a hand valve, which is arranged such that it connects the engine ports to the tank and the pump, and which hand valve has two open positions, wherein the pump in the first open position via a line is connected to the first engine port and the tank via a line is connected to the second engine port, and wherein the pump in the second open position via the line is connected to the second engine port and the tank via the line is connected to the first engine port, and a first nonreturn valve, arranged between the pump and the second engine port and opens towards the second engine port.

Abstract: Valve arrangement for controlling the flow of fluid through a conduit and comprising a valve body with a first and a second valve port which serve, alternately, as input and output, and a valve cone arranged in the valve body which connects in its open position the valve ports with each other, and is actuated by a holding force which is greater than the force acting on the pressurized fluid side of the valve cone (46) and dependent on the medium pressure in the input port.

Abstract: A pressure activated piston-cylinder device includes a cylinder barrel with a cylinder bore, a piston with a piston rod movably guided in the cylinder bore, and a piston position sensing and indicating device. The piston position sensing and indicating device includes a magnetic activating element carried on the piston and an elongate electronic contact free transducer mounted on the cylinder barrel. The cylinder barrel includes a standard type extruded aluminum alloy barrel with an outer channel which extends in an offset parallel disposition relative to the cylinder bore, and a circuit board with electronic components connected to the transducer. The transducer as well as the circuit board are located in the groove in the cylinder barrel.