A rotary pump includes a housing featuring a delivery space which the housing surrounds and axially delineates on the end sides; an inner rotor rotatable in the delivery space; an outer rotor rotatable about a pump rotational axis in the delivery space and forming delivery cells with the inner rotor; and a circumferential bearing wall which mounts and surrounds the outer rotor rotatably about the pump rotation axis in radial sliding contact. The circumferential bearing wall includes multiple blind pockets which are radially open towards the outer rotor and/or the outer rotor includes multiple blind pockets which are radially open towards the circumferential bearing wall.

A gear pump includes a pair of gears having meshed teeth. One of the gears is configured for connection to a source of drive. The gears are received within a housing. The housing has an inlet port configured for connection to a source of fluid and an outlet port. Each of the gears have a shaft rotating within the housing on a bearing on each axial side of each gear. At least one of the bearings associated with each of the pair of gears has a plurality of springs received in recesses to bias the said at least one bearing against an end face of a respective one of the pair of gears. A retention plate holds each of the plurality springs. A method of assembly is also disclosed.

A cartridge vane pump includes: a body-side side plate that is brought into contact with end surfaces of a rotor and a cam ring; first and second discharge ports that are formed in the body-side side plate; and an adapter that is formed with first and second connection channels for connecting the first and second discharge ports formed in the body-side side plate and first and second discharge channels formed in a body.

A variable oil pump includes a pump rotor housed in a housing and rotationally driven, an adjustment ring that adjusts an amount of oil discharged from the pump rotor by being displaced under hydraulic pressure supplied to a hydraulic chamber between the housing and the pump rotor in a state where the pump rotor is rotatably held from an outer peripheral side, and a vane provided in a portion where the adjustment ring and the housing face each other and that seals oil leakage to an outside of the hydraulic chamber. The adjustment ring includes a vane holding portion that holds the vane and an oil passage through which the hydraulic pressure in the hydraulic chamber is drawn into the vane holding portion.

A variable oil pump includes a pump housing, a cover, an oil pump rotor rotationally driven while housed in a housing space between the pump housing and the cover, an adjustment member housed in the housing space to adjust the amount of oil discharged from the oil pump rotor by being displaced due to a drive force while rotatably holding the oil pump rotor from an outer peripheral side, and a guide portion including a groove in the adjustment member and a pin on the pump housing that engage one another. Engagement of the pin and the groove guides displacement of the adjustment member relative to the pump housing. A seal structure on at least one of the pump housing and the cover seals the inside of the groove relative to the housing space by surrounding a movement trajectory of the groove relative to the pin.

A motor pump unit with a multipart housing comprises a reversible internal gear machine and an electric motor with a rotor and a stator, which is coupled to the internal gear machine via a shaft rotatably mounted in the housing. One shaft end extends from the internal gear machine axially through the rotor that is carried by the shaft. First and second connecting channel ends in the working chamber of the internal gear machine are connected via check valves in the housing to a leakage channel loop, which is fluidically connected to a leakage channel that is fluidically connected to the working chamber, and which has a shaft leakage channel extending axially through the shaft and a rotor leakage channel that is fluidically connected thereto and extends axially through the rotor and/or a gap leakage channel between the rotor and stator, which is fluidically connected to the shaft leakage channel.

A fuel flow control assembly for an aircraft engine. The assembly includes a gear arrangement having a shaft. Also included is a bearing structure operatively coupled to each shaft. Further included is a pressure pad disposed adjacent the bearing structure, the pressure pad having a radially extending port for receiving a fuel flow. Yet further included is a flow metering device in flow communication with the port of the pressure pad to restrict the fuel flow at a low pressure operating condition and open the port to increase the fuel flow at a high pressure operating condition.

A fluid pump includes a housing defining a cavity. An end plate is disposed within the cavity and divides the cavity into a gear section and an end section. A gear set is disposed within the gear section and comprises at least one gear rotatable about an axis. The end plate is movable longitudinally along the axis for compressing the gear set. A channel is in fluidic communication with the end section for supplying a fluid to the end section to force the plate toward the gear set.

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 positive-displacement pump, in particular a vane-type pump for the delivery of a fluid for a consumer of a steering system includes a rotor, a cam ring, a housing-side control plate, and a cover-side control plate that form, in an assembled state, a rotor assembly. The housing-side control plate is arranged adjacent to a housing face surface in an axial direction and the cover-side control plate is arranged adjacent to a cover face surface in the axial direction. The rotor assembly is movable in the axial direction between the housing face surface and the cover face surface.