Abstract: A rotary pump including: a housing having an inlet and an outlet for a fluid, and a delivery chamber connected to the inlet and outlet; a delivery rotor rotatable in the delivery chamber about a rotational axis has a structure which is central in relation to the rotational axis; and a setting structure surrounding the delivery rotor and with the delivery rotor forms delivery cells, delivering the fluid from the inlet to the outlet, can be moved back and forth relative to the delivery rotor, in order to adjust a delivery volume of the rotary pump. At least one of the setting structure and/or the rotor structure is a material composite structure including a molded region made of plastic and a functional region which is fixedly connected to the molded region and made of a functional material which has a different chemical composition to the plastic of the molded region.

Abstract: A gas pump including a first housing part (1) comprising a sealing surface (6); a second housing part (2) comprising a sealing surface (7); a delivery chamber (3) comprising an inlet (4) and an outlet (5) for a gas; and a delivery device (11, 12), which can be moved within the delivery chamber (3), for delivering the gas, wherein the housing parts (1, 2) are joined to each other such that they at least partially enclose the delivery chamber (3) over a circumference of the chamber, and such that their sealing surfaces (6, 7) abut each other in order to seal off the delivery chamber (3), and wherein a sealing recess (9) extends in at least one of the sealing surfaces (6, 7) around the delivery chamber (3) and is filled with a sealing liquid when the gas pump is in operation.

Abstract: A pump including a rotor; a first housing part and a second housing part, between which the rotor is arranged such that it can be rotated about a rotational axis relative to the first and second housing part; at least one positioning element which positions the second housing part with respect to its angular position about the rotational axis relative to the first housing part; and a spring, wherein the second housing part is arranged between the spring and the rotor, wherein the spring is fastened to the at least one positioning element or the second housing part.

Abstract: A pump, comprising: an accommodating housing (20) which forms a cup-shaped accommodating space (25) comprising an end-facing wall (20c) and a circumferential wall (20d); and a pump insert (1) which is arranged in the accommodating space (25), wherein the pump insert (1) comprises: a rotor (4); a first housing part (2) and a second housing part (3), between which the rotor (4) is arranged such that it can be rotated about a rotational axis (R) and relative to the first and second housing part (2, 3); and a stroke ring (12) which surrounds the rotor (4) and is arranged between the first housing part (2) and the second housing part (3), wherein a spring (5) which flexes along or in the direction of the rotational axis (R) is arranged between the accommodating housing (20) and the second housing part (3), wherein the spring (5) comprises a spring structure (5b) which is made of metal, in particular steel, and which imbues the spring (5) with its essential spring characteristics along or in the direction of t

Abstract: An adjustable delivery volume rotary pump, including: first and second housing structures; a delivery chamber comprising a first chamber wall formed by the first housing structure, a second chamber wall formed by the second housing structure, a fluid inlet in a low-pressure region and a fluid outlet in a high pressure region; a pump wheel rotatable about a rotational axis in the delivery chamber; and a pressing device for generating pressing force. The second housing structure can be moved relative to the first housing structure from a first to a second position, against the pressing force. In the second position, a gap exists between the first and the second chamber walls and fluid can escape from the delivery chamber by bypassing the inlet and the outlet, or a circulation of the fluid which reduces the delivery rate of the rotary pump arises in the gap within the delivery chamber.

Abstract: A device for adjusting the rotational angular position of a cam shaft relative to a crankshaft of a combustion engine includes a supply branch for supplying pressure fluid to setting chambers to generate torque acting on a rotor; and a pressure storage device arranged in the supply branch and including a spring and a storage chamber which can be filled with the pressure fluid against a spring force of the spring, wherein the storage chamber begins to fill, against the spring force, at a start-of-filling pressure which is at most as large as a hot idling pressure which the pressure fluid exhibits when the combustion engine is idling in its hot operational state, and continues to be filled against the spring force if the hot idling pressure is exceeded.

Abstract: A method for powder-metallurgically manufacturing a rotational body, including compacting a first starting body is compacted from a metal powder; forming a second starting body from metal, separately from the first starting body; placing the starting bodies against each other in axial contact via end faces in relation to a longitudinal axis of the rotational body; and permanently and firmly sintered the first starting body and the second starting body to each other by collective sintering. The first starting body is compacted from an aluminum-based powder, the second starting body is formed from an aluminum material, and the starting bodies are sintered to each other at their respective end faces.

Abstract: A coolant pump for delivering a coolant in a coolant circuit of a combustion engine, including: a housing; a drive shaft, rotatably mounted by the housing and rotationally driven by the combustion engine; a radial feed wheel, rotationally driven by the drive shaft, for delivering coolant from a radially internal inflow region into a radially more external outflow region; a setting structure, adjustable into different positions relative to the housing by control fluid, for adjusting a flow geometry which influences the delivery volume of the pump at a given rotational speed; a control valve for setting a pressure or volume flow of the control fluid which determines the position of the setting structure; and a servo pump, which is a rotary pump including at least one servo pump wheel and can be rotationally driven by the drive shaft, for delivering the control fluid to the control valve.

Abstract: A control valve for controlling a pressure fluid, said control valve comprising: a valve housing (10) comprising a valve inlet (P) for the pressure fluid, a control port (A, B) for connecting to an assembly which is to be operated using the pressure fluid, and a valve outlet (TA, TB); a valve piston (20) which can be moved in the valve housing (10) along an axis (R) and which comprises a hollow space (21) through which the pressure fluid can flow from the valve inlet (P) to the control port (A, B); and a filter device (30) which is arranged in the control valve and comprises a filter cross-section (35) which filters the pressure fluid as it passes through it, wherein at least a part of the filter cross-section (35) of the filter device (30) is situated in the hollow space (21) of the valve piston (20).

Abstract: A displacement pump, including a pump chamber and a regulating chamber which are separated from each other by a piston, wherein the pump has a device with which fluid flowing from the pump chamber toward the regulating chamber can be drained.

Abstract: A rotary pump with an improved seal on a control pressure chamber, including: a housing having a delivery chamber; a feed wheel rotatable in the delivery chamber; an actuating member surrounding the feed wheel forming delivery cells and moveable in the housing relative to the feed wheel. The control pressure chamber is delineated by the actuating member together with axially facing axial co-operating surfaces, forming an axial sealing gap and a radial sealing gap. A control fluid can be introduced into the control pressure chamber for applying pressure to the actuating member to exert an actuating force in the actuating direction; a restoring device for generating a restoring force; and a sealing element arranged on the actuating member or the circumferential co-operating surface. To compensate for a change in gap width of one of the axial sealing gaps, a base leakage cross-section is provided on the sealing element.

Abstract: A gas pump including a delivery chamber with an inlet and an outlet for a gas; a first housing part with a first sealing surface which at least partially surrounds the delivery chamber; a second housing part with a second sealing surface which at least partially surrounds the delivery chamber, wherein the second housing part together with the first housing part at least partially encloses the delivery chamber; a delivery device which can be moved within the delivery chamber, for delivering the gas; and a pressing device which presses one of the housing parts against the other with a pressing force, such that the sealing surfaces abut each other and together form a sealing join which at least partially surrounds the delivery chamber, in order to seal off the delivery chamber, wherein the second housing part can be moved relative to the first housing part, against the pressing force, in order to be able to widen the sealing join to form a relieving gap through which liquid situated in the delivery chamber can e

Abstract: A rotary pump having a variable delivery volume, including: a casing; a delivery chamber formed in the casing; at least one delivery rotor which is rotatable in the delivery chamber; an actuating member which is arranged facing a front face of the delivery rotor or surrounds the delivery rotor, and is moveable in the casing for adjusting the delivery volume; the actuating member chargeable with an actuating force which is dependent on a fluid requirement; a track which is formed in the casing and guides the actuating member on an actuating member sliding surface in a sliding contact; and a sliding material which forms at least one of the track and the actuating member sliding surface.

Abstract: A gas pump including a first housing part (1) comprising a sealing surface (6); a second housing part (2) comprising a sealing surface (7); a delivery chamber (3) comprising an inlet (4) and an outlet (5) for a gas; and a delivery device (11, 12), which can be moved within the delivery chamber (3), for delivering the gas, wherein the housing parts (1, 2) are joined to each other such that they at least partially enclose the delivery chamber (3) over a circumference of the chamber, and such that their sealing surfaces (6, 7) abut each other in order to seal off the delivery chamber (3), and wherein a sealing recess (9) extends in at least one of the sealing surfaces (6, 7) around the delivery chamber (3) and is filled with a sealing liquid when the gas pump is in operation.

Abstract: An adjustable delivery volume rotary pump, including: first and second housing structures; a delivery chamber comprising a first chamber wall formed by the first housing structure, a second chamber wall formed by the second housing structure, a fluid inlet in a low-pressure region and a fluid outlet in a high pressure region; a pump wheel rotatable about a rotational axis in the delivery chamber; and a pressing device for generating pressing force. The second housing structure can be moved relative to the first housing structure from a first to a second position, against the pressing force. In the second position, a gap exists between the first and the second chamber walls and fluid can escape from the delivery chamber by bypassing the inlet and the outlet, or a circulation of the fluid which reduces the delivery rate of the rotary pump arises in the gap within the delivery chamber.

Abstract: An adjusting valve adjusting valve for adjusting the delivery volume of a displacement pump includes a valve casing, a valve piston which is mounted such that the valve piston can be moved within the valve casing, a valve spring which counteracts a force exerted by the valve-actuating pressure on the valve piston, and an adjusting device serving to adjust the valve piston in the direction of or counter to the force exerted by the valve-actuating pressure. A displacement pump exhibiting an adjustable delivery volume, includes a pump casing, a delivery chamber formed in the pump casing and a delivery member and the adjusting valve for adjusting the delivery volume, arranged in a flow of the fluid delivered by the delivery member.

Abstract: A rotary pump with an improved seal on a control pressure chamber, including: a housing having a delivery chamber; a feed wheel rotatable in the delivery chamber; an actuating member surrounding the feed wheel forming delivery cells and moveable in the housing relative to the feed wheel. The control pressure chamber is delineated by the actuating member together with axially facing axial co-operating surfaces, forming an axial sealing gap and a radial sealing gap. A control fluid can be introduced into the control pressure chamber for applying pressure to the actuating member to exert an actuating force in the actuating direction; a restoring device for generating a restoring force; and a sealing element arranged on the actuating member or the circumferential co-operating surface. To compensate for a change in gap width of one of the axial sealing gaps, a base leakage cross-section is provided on the sealing element.

Abstract: A control valve for controlling a pressure fluid, said control valve comprising: a valve housing (10) comprising a valve inlet (P) for the pressure fluid, a control port (A, B) for connecting to an assembly which is to be operated using the pressure fluid, and a valve outlet (TA, TB); a valve piston (20) which can be moved in the valve housing (10) along an axis (R) and which comprises a hollow space (21) through which the pressure fluid can flow from the valve inlet (P) to the control port (A, B); and a filter device (30) which is arranged in the control valve and comprises a filter cross-section (35) which filters the pressure fluid as it passes through it, wherein at least a part of the filter cross-section (35) of the filter device (30) is situated in the hollow space (21) of the valve piston (20).

Abstract: A rotary pump having a variable delivery volume, including: a casing; a delivery chamber formed in the casing; at least one delivery rotor which is rotatable in the delivery chamber; an actuating member which is arranged facing a front face of the delivery rotor or surrounds the delivery rotor, and is moveable in the casing for adjusting the delivery volume; the actuating member chargeable with an actuating force which is dependent on a fluid requirement; a track which is formed in the casing and guides the actuating member on an actuating member sliding surface in a sliding contact; and a sliding material which forms at least one of the track and the actuating member sliding surface.

Abstract: A coolant pump for delivering a coolant in a coolant circuit of a combustion engine, including: a housing; a drive shaft, rotatably mounted by the housing and rotationally driven by the combustion engine; a radial feed wheel, rotationally driven by the drive shaft, for delivering coolant from a radially internal inflow region into a radially more external outflow region; a setting structure, adjustable into different positions relative to the housing by control fluid, for adjusting a flow geometry which influences the delivery volume of the pump at a given rotational speed; a control valve for setting a pressure or volume flow of the control fluid which determines the position of the setting structure; and a servo pump, which is a rotary pump including at least one servo pump wheel and can be rotationally driven by the drive shaft, for delivering the control fluid to the control valve.