An impeller 1 for a pump includes a cylindrical bush 13 rotatably held at an eccentric position within a cylindrical pump housing via a rotating shaft 3 and a plurality of vanes 11 that are fixed to an outer circumferential face of the bush 13 and radially extend to divide the inside of the pump housing into a plurality of compartments 14, each of the vanes 11 being made of a rubber-like elastic material and being formed inclined in a rotational direction of the bush 13 relative to a radial direction from the rotating shaft 3 of the bush 13.

A pump for conveying a fluid includes a pump housing, an eccentric, a deformable element arranged in a pump gap between the inner circumferential surface of the pump housing, and an outer surface of the eccentric, such that a conveying channel is formed from an inlet to an outlet. A stationary seal is provided between the outlet and the inlet and prevents a backflow of the fluid from the outlet back to the inlet. The inner circumferential surface of the pump housing has a recess in the region of the stationary seal, and the deformable element is tensioned fluid-tight at the inner circumference surface in the region of the recess using a pin.

A high speed, rotary lobe gear pump assembly is provided which combines a positive displacement lobe gear pump having wipers with a centrifugal pump utilizing an impeller. The centrifugal pump feeds high pressure fluid flow directly into the lobe gear pump allowing the gear pump to rotate at high speeds without cavitation. The high speed capability of the pump assembly allows the lobe gear pump to operate without speed reduction gearing for the motor shaft.

A hydraulic device for an internal combustion engine or a gearing system, the hydraulic device including a housing featuring a chamber wall structure which delineates a pressure chamber for a pressurised hydraulic fluid; an actuating member which can be adjusted in the housing relative to the chamber wall structure in an actuating direction and in an actuating counter direction opposite to the actuating direction in order to adjust the delivery volume or phase position; and a sealing element including a sealing structure and a spring structure which is supported or moulded on one of the chamber wall structure and the actuating member, preferably the actuating member, and presses the sealing structure into sealing contact with the other of the chamber wall structure and the actuating member with a spring force in order to seal off the pressure chamber. The sealing structure and the spring structure are moulded in one piece.

A pump is formed by a housing (10) having an inlet (11) and an outlet (12) for a fluid. The housing (10) contains a rotator (13) provided with at least one surface recess (17a, 17b, 17c, 17d) that forms with an interior surface of the rotor a chamber (18a, 18b, 18c, 18d) that, on rotation of the rotor (13), conveys fluid from the inlet (11) to the outlet (12). A flexible seal (23) is provided on or as part of the housing (10) and is located between the inlet (11) to the outlet (12) to engage the rotor (13) to prevent fluid passing from the outlet (12) to the inlet (11). A second inlet (16) is provided leading to the outlet (12) for the supply to the outlet (12) of a second fluid and the second inlet (16) also supplies the second fluid to the back of the seal (23) to urge the seal (23) against the rotor (13).

A vane assembly for use in a rotary vane actuator, the vane assembly comprising: a rotatable vane having a first side and a second side; a vane axle connected to the rotatable vane for converting pressure exerted on the rotatable vane into rotational motion; a vane seal on the first side of the rotatable vane, the vane seal being for sealing the rotatable vane; and a side-plate on the first side of the rotatable vane, the side-plate clamping the vane seal in position; wherein the side-plate comprises: an outer part providing an outer surface of the side-plate, the outer part defining an internal volume; and an inner part filling or substantially filling the internal volume defined by the outer part, the inner part being distinct from the outer part.

Improved solids handling in rotary positive displacement machines, where the machines are based on trochoidal geometry, can be achieved through the use of solids-handling features on the surface of the rotor and/or stator and/or by the use of modified seals mounted on the rotor or stator. In at least some embodiments the rotary machines comprise a helical rotor that undergoes planetary motion relative to a helical stator.

A pump comprising a housing and a rotor rotatably accommodated in the housing and having an axis of rotation. The housing comprises a resilient seal member, an inlet and an outlet for fluid. The rotor comprises first and second surface areas, and the rotor and housing are cooperatively configured such that the second surface area is radially recessed from the first surface area, forming a chamber with an interior surface of the housing, and the first surface area seals against the interior surface. The seal member is located azimuthally between the outlet and the inlet. The seal member will engage the first and second surface areas, operative to prevent the passage of fluid from the outlet to the inlet as the rotor rotates. An edge of the seal member is coterminous with an aperture through which the fluid can flow.

An embodiment provides a vane pump device. In the vane pump device, vane grooves of a rotor include columnar grooves which accommodate oil, and support the vanes. An inner-plate low pressure side recess portion is provided in an end surface of an inner plate along a rotation direction, and supplies oil to the columnar grooves. An outer-plate low pressure side through-hole and an outer-plate low pressure side recess portion are provided in an end surface of an outer plate along the rotation direction, and supply oil to the columnar grooves at a position facing the inner-plate low pressure side recess portion. An opening area of the inner-plate low pressure side recess portion is equal to a sum of opening areas of the outer-plate low pressure side through-hole and the outer-plate low pressure side recess portion.

A pump assembly comprises an inlet, an outlet and a housing having an inlet aperture in fluid connection with the inlet, and an outlet aperture in fluid connection with the outlet. A rotor located within the housing is shaped to form with an interior surface of the housing a chamber. On rotation of the rotor, the chamber conveys fluid from the inlet aperture to the outlet aperture. The housing carries a seal located in the inlet and urged into contact with the rotor to prevent the passage of fluid past the rotor from the outlet to the inlet. Center lines of the inlet and the outlet are parallel to one another. The outlet can be formed by linear movement of a mold core.