Prominent Gmbh

Martin Reinhard

Christian Arnold

Roland Elgetz

Marc Mohr

Dieter Binz

Bernd Freissler

Thomas Freudenberger

Martin Wittmer

Gabriele Hehl

Holger Ludwig

Jorg Maltry

Maximilian Goepfert

Jörg Maltry

The present invention relates to a check valve, and to a device having a check valve, and to a method of cleaning a check valve. In order to provide a check valve or a device having a check valve or a method of cleaning a check valve, in which sufficient cleaning of the non-flow-facing regions of the valve closing body is also ensured, it is proposed according to the invention that an element reducing the flow cross-section is provided in a region of the opening stop in addition to the opening stop so that, when the valve closing body is in the open position and the fluid flows through the check valve counter to the blocking direction, a non-flow-facing region of the surface of the valve closing body has at least an average wall shear stress of 50% compared to an average wall shear stress of a flow-facing region of the surface of the valve closing body.

Geometrical influence on non-flow-facing closing-body regions

The present invention relates to a method for moving a fluid comprising the steps a. providing a metering head comprising a metering chamber and a displacement element which delimits said metering chamber, b. moving the displacement element in a suction direction from a first position to a second position, wherein a volume of the metering chamber in the second position of the displacement element is greater than a volume of the metering chamber in the first position of the displacement element such that fluid is drawn into the metering chamber via a fluid inlet during a suction stroke, c. moving the displacement element in a pressure direction from the second position to the first position such that fluid is forced out of the metering chamber via a fluid outlet during a pressure stroke. In order to provide a method for moving a fluid or a corresponding metering pump with which a number of the aforementioned disadvantages are prevented without the need for additional components, it is proposed according to the invention that the movement of the displacement element in suction direction during the suction stroke involve at least two changes of direction before the displacement element reaches the second position and/or that the movement of the displacement element in pressure direction during the pressure stroke involve at least two changes of direction before the displacement element reaches the first position.

Metering pump with temporary reversal of direction of the displacement element

The present invention relates to a diaphragm pump for conveying a fluid, a method for starting up a diaphragm pump for conveying a fluid and the use of a diaphragm pump for conveying a fluid.

Diaphragm pump for conveying a fluid

The present invention concerns a dosing pump comprising a dosing chamber, a working chamber and a dosing diaphragm, wherein the dosing chamber and the working chamber are separated from each other by the dosing diaphragm, wherein there is provided a device for reciprocating movement of the dosing diaphragm between a first position and a second position, wherein the volume of the dosing chamber is smaller in the first position than in the second position. To provide a dosing pump, the dosing diaphragm of which has an increased service life and which as far as possible can be hydraulically operated even at very low dosing fluid pressures at the suction side it is proposed according to the invention that there is provided a prestressing device which prestresses the dosing diaphragm in the direction of the first or second position.

Dosing pump with dosing diaphragm

The invention concerns a dosing pump for moving a fluid, comprising a dosing head in which there is a dosing chamber and a displacement element reciprocatable between a first and a second position, wherein the displacement element delimits the dosing chamber, and the volume of the dosing chamber in the first position of the displacement element is greater than the volume of the dosing chamber in the second position of the displacement element, wherein the displacement element is coupled to a linear motor by way of a stroke element in such a way that in operation of the linear motor the stroke element performs a forward stroke and a return stroke in a housing in a direction of a movement axis with a stroke length h and the displacement element is reciprocated between the first position and the second position. To provide a dosing pump and to improve dosing pumps which are driven with a linear motor it is therefore proposed according to the invention that the stroke element has a cross-sectional area Q perpendicularly to the movement axis, wherein the square of the stroke length h is at least forty times greater than the cross-sectional area Q.

Dosing pump with linear motor

A device for moving a fluid includes a dosing head in which a dosing chamber is arranged, and a displacement element which can be moved between a first and second position. The displacement element borders the dosing chamber, and the volume of the dosing chamber in the first position differs from the volume in the second position. drive unit for moving the displacement element from the first position to the second position and a return mechanism for moving the displacement element back are provided. The return mechanism has two magnetic parts. The first part is placed on the dosing head, the second part is connected to the displacement element, and the two parts are designed such that a magnetic force causes a force to be applied to the displacement element in the direction of the first position.

Fluid movement device

The invention relates to a device for generating a pulsating hydraulic fluid pressure in a working chamber () filled with hydraulic fluid, comprising a driveable working piston () movably guided in a hollow working cylinder, wherein a working chamber () that is in fluid communication with the working piston () is provided, such that, by means of the movement of the working piston () within the hollow working cylinder, a pulsating hydraulic fluid pressure can be generated in the working chamber (). In order to provide a device for generating a pulsating hydraulic fluid pressure and in particular a diaphragm metering pump comprising such a device, which has small dimensions and in addition a rapid passage through the phase between closing the suction valve and opening the pressure valve, according to the invention, an auxiliary piston () is movably guided in a hollow auxiliary cylinder and is in fluid communication with an additional chamber (), wherein a closeable auxiliary channel (), which connects the additional chamber () and the working chamber (), is provided, wherein the auxiliary piston () and the hollow auxiliary cylinder are formed and arranged in such a way that, by moving the auxiliary piston () within the hollow auxiliary cylinder, a hydraulic fluid arranged in the additional chamber () can at least partly be forced out of the additional chamber () into the auxiliary channel () and from the auxiliary channel () into the working chamber ().

Device for generating a pulsating hydraulic fluid pressure by a drivable working piston guided in a cylinder and an auxiliary piston guided in an auxiliary cylinder wherein the auxiliary piston transfers fluid to an auxiliary channel only in a first stroke section

The present invention concerns a diaphragm pump comprising a delivery chamber separated from a hydraulic chamber by way of a diaphragm, wherein the delivery chamber is respectively connected to a suction connection and a pressure connection and the hydraulic chamber which can be filled with a working fluid can be acted upon with a pulsating working fluid pressure and the diaphragm can be reciprocated between a pressure position in which the volume of the delivery chamber is smaller and a suction position in which the volume of the delivery chamber is larger. In that arrangement the hydraulic chamber is connected to a working fluid supply by way of a leak replenishment valve, wherein the leak replenishment valve is so designed that when the pressure in the hydraulic chamber in the suction position of the diaphragm is less than a predetermined minimum value pthe leak replenishment valve opens and the hydraulic chamber has an outlet passage which is closed by a pressure limiting valve which is so designed that if the pressure in the hydraulic chamber rises above a predetermined maximum value pthe pressure limiting valve opens and working fluid can leave the hydraulic chamber by way of the outlet valve. To provide a corresponding diaphragm pump which automatically reduces the metering power in the overpressure situation without the use of additional sensors being necessary it is proposed according to the invention that the working fluid supply is arranged in a first and in a second chamber, the two chambers being connected together by way of a first connecting passage.

Diaphragm pump with reduced leak extension in the event of overload

A diaphragm pump includes a pumping chamber, suction and pressure connections, a working chamber filled with a hydraulic fluid, a device for applying an oscillating pressure Pto the hydraulic fluid, and a diaphragm separating the pumping chamber and the working chamber moveable between a pressure stroke position and a suction stroke position. A storage chamber accommodates hydraulic fluid at a pressure P. The storage chamber and the working chamber are connected to each other by a valve having a closing part. The diaphragm cannot move too far beyond the pressure stroke position. The diaphragm is coupled to the closing part so that the valve is opened when the diaphragm moves from the pressure stroke position to a position that is farther from the suction stroke position than the pressure stroke position.

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Heidelberg, Germany

Martin Reinhard