A pump, wherein a first pressure space and a second pressure space are formed between an end-facing wall of an accommodating housing and a second housing part of a pump insert, wherein an annular sealing element which is arranged between the end-facing wall and the second housing part encloses the second pressure space and seals it off in relation to the first pressure space, wherein the first pressure space is connected via a first outlet channel to a first delivery chamber which is formed between a rotor and a stroke ring of the pump insert, and the second pressure space is connected via a second outlet channel to a second delivery chamber which is formed between the rotor and the stroke ring.

The invention relates to a pump, having a contour ring, having a rotor, having vanes, having side plates, having a housing and a housing cover, having under-vane grooves for supplying the lower vane faces with pressure, the vanes being arranged radially displaceably in the rotor and extending under the vanes as a result of the pressure and being pressed against the contour ring. Furthermore, the invention relates to a system for supplying oil to a consumer.

A rotary pump including: a pump housing including a circumferential wall, which surrounds a delivery chamber, a first end-face wall and a second end-face wall which delineate the delivery chamber at its end-face sides; a rotor, which can be rotated in the delivery chamber, for forming delivery cells; a pressure outlet which emerges on an outer end-face side of the first end-face wall facing away from the delivery chamber; an outlet gasket which is provided on the outer end-face side of the first end-face wall, for sealing off the pressure outlet; and a pressing device for charging the outlet gasket with an axial pressing force.

A pump body assembly, a compressor and an air conditioner are provided. The pump body assembly includes a cylinder assembly, which is connected to a first flange and a second flange respectively and is disposed between the first flange and the second flange; a rotation shaft, which is provided and passes through the first flange, the cylinder assembly and the second flange in sequence, and which is provided thereon with sliding vane grooves; and a sliding vane, which is provided inside the sliding vane groove and fits the cylinder assembly to form a working cavity in the cylinder assembly. The first flange is provided thereon with an exhaust channel which is in communication with the working cavity, and the second flange is provided thereon with a gas flow balance portion.

A connection assembly for use in an axial piston machine has a feed pump and a main body. The main body is equipped with at least one fluid connection. The feed pump is configured as an internal gear pump or as a vane-type pump. A pump assembly defines a planar sealing surface which bears at least indirectly against the main body. The main body has a second recess in which the pump assembly is received at least in certain portions. A separate cover is provided which covers the second recess and the pump assembly in each case at least in certain portions. The cover bears against the main body. An elastic element is installed under preload between the cover and the receiving part such that a corresponding preload force is supported at least indirectly on the main body via the sealing surface.

A progressive cavity pump includes a sealed drive between the rotor and universal joint. The universal joint includes a socket configured to receive a drive shaft of the rotor. A cover, such as a locking nut, is disposed over the connection between the rotor and universal joint. Seals are retained in place by the locking nut to prevent abrasive materials from entering into the interface between the rotor and the universal joint.

A pump housing of an oil pump includes a suction port that supplies oil to a pump room, a discharge port that discharges oil from the pump room, and a seal portion that suppresses leakage of oil from the pump room to outside of the pump room. A shaft of the oil pump includes a small diameter portion and a large diameter portion having different diameters, the small diameter portion is connected to the inner rotor, and the shaft and the inner rotor integrally rotate. The seal portion is in contact with a side surface of the inner rotor extending in a diameter direction of the shaft, and also extends to a region in the diameter direction on an inner side smaller than the large diameter portion in the diameter direction.

A cartridge vane pump includes a rotor, a plurality of vanes, a cam ring, a side member brought into contact with a first end surface of the cam ring, a cover member brought into contact with a second end surface of the cam ring, the cover member being attached to the body, and a linkage member provided to extend between the side member and the cover member over an outer circumferential surface of the cam ring, the linkage member being configured to link the side member and the cover member.

A pump apparatus comprising a pump chamber having a fluid inlet and a fluid outlet; and a flexible impeller mounted for rotation within the pump chamber, wherein the pump chamber is defined by a curved wall, the wall including a first wall portion having a first radius and a second wall portion having a second radius, wherein the second radius is greater than the first radius; the flexible impeller includes a plurality of radially extending vanes, wherein the vanes contact the curved wall of the pump chamber such that separate pump cavities are defined between adjacent vanes and the pump chamber wall; the flexible impeller is driven to rotate by a drive shaft; the drive shaft passes through a first end wall which closes one side of the pump chamber and a distal end of the drive shaft rotates within a bearing defined by a second end wall which closes the opposite side of the pump chamber; and wherein the fluid inlet and the fluid outlet are defined in the second end wall.

The invention relates to a rotary piston pump comprising a housing with a housing interior, an inlet opening, and an outlet opening; a first rotary piston which is mounted within the housing interior in a rotational manner about a first rotational axis; and a second rotary piston which is mounted within the housing interior in a rotational manner about a second rotational axis. The first rotary piston and the second rotary piston engage into each other in a region between the first and the second axis and displace liquid. The first rotary piston has a frame assembly which comprises multiple mutually spaced plates and is at least partly filled and enveloped with a polymer material.