“The disclosure relates to a pump at least for conveying a fluid, comprising at least one conveyor device which has at least one conveyor chamber, at least one dimensionally stable conveyor chamber element that at least partly delimits the conveyor chamber, and at least one elastically deformable conveyor element that together with the conveyor chamber element delimits the conveyor chamber and is arranged on the conveyor chamber element; at least one drive unit for acting on the conveyor device; and at least one housing for receiving the conveyor device, wherein the housing is formed at least separately from the conveyor chamber element of the conveyor device, in particular from the conveyor device as a whole, in particular such that the conveyor chamber element, in particular the conveyor device, can be removed as a whole from the housing.”

An infusion pump apparatus includes a length of resilient tubing removably loadable in an infusion pump having a housing, a pumping mechanism, and a pump door. A latch member is pivotally mounted to the pump door and cooperates with a latch pin fixed on pump housing. A free-flow protection device is biased to pinch the tubing closed to stop fluid flow. The latch member has a first range of pivotal motion in a latching direction for causing the latch member to engage with the latch pin to secure the door in a closed position and a second range of pivotal motion in the latching direction for causing the latch member to actuate the free-flow protection device to unpinch the tubing and allow flow. The latch member pivots through at least a portion of the first range of pivotal motion before beginning to pivot through the second range of pivotal motion.

A conveyor device is disclosed for at least conveying a fluid with at least one conveyor chamber, with at least one dimensionally stable conveyor chamber element that at least partially delimits the conveyor chamber, with at least one elastically deformable and, in particular, annular conveyor element, particularly a conveyor membrane, that delimits the conveyor chamber together with the conveyor chamber element and is arranged on the conveyor chamber element, and with at least one pressing unit intended for generating an inhomogeneous pressing force, particularly at least in a non-conveying state of the conveyor element, at least in a sealing region between the conveyor element and the conveyor chamber element along a maximum overall extent of the sealing region, particularly along a maximum circumferential extent between the conveyor element and the conveyor chamber element.

The disclosure relates to a conveyor device for at least conveying a fluid with at least one conveyor chamber, with at least one dimensionally stable conveyor chamber element that at least partially delimits the conveyor chamber and with at least one elastically deformable and, in particular, annular conveyor element, particularly a conveyor membrane, that delimits the conveyor chamber together with the conveyor chamber element and is arranged on the conveyor chamber element, wherein the conveyor element has at least one sealing extension that is designed integrally with a base body of the conveyor element and at least partially arranged in a sealing groove of the conveyor chamber element when the conveyor element is arranged on the conveyor chamber element.

A conveyor device for conveying at least a fluid, comprises at least one conveyor chamber, at least one dimensionally stable conveyor chamber element formed separately from a housing in particular and at least partly delimits the conveyor chamber and at least one elastically deformable conveyor element, in particular a conveyor membrane, which together with the conveyor chamber element delimits the conveyor chamber and is arranged on the conveyor chamber element. The conveyor chamber element comprises at least one connecting piece for a fluid supply line adapter designed to differ from a tube, and/or at least one connecting piece, in particular an additional connecting piece, for a fluid discharge line adapter, which is designed to differ from a tube, said connecting piece/connecting pieces being arranged on a conveyor chamber element face facing away from the conveyor element, in particular on the exterior of the conveyor chamber element.

A rotary pump comprising a housing (1) defining an annular chamber with inlet and outlet ports (12;11) spaced apart around the chamber, a flexible annular diaphragm (3) forming one side of the chamber spaced opposite an annular wall of the housing (1), the diaphragm (3) being sealed at its edges to the housing (1), a partition (13) extending across the chamber from a location between the inlet and outlet ports (12;11) to the diaphragm (3). The diaphragm (3) is configured to be pressed progressively against the opposite wall of the housing (1) to force fluid drawn in at the inlet port (12) on one side of the partition (13) around the chamber and to expel it at the outlet port (11) at the other side of the partition (13). The outer face of the annular diaphragm (3) has a trough (40) at the part of the diaphragm (3) which faces the inlet port (12) and/or at the part of the diaphragm 3 which faces the outlet port (11).

In many pump types, in particular in orbital pumps, there is an optimization need with regard to the running characteristics, in particular with regard to parameters which relate to the delivery flow. What is provided is an orbital pump device for delivering liquid medium by a rotational movement including a hydraulic housing surrounding a hydraulic chamber in a fluid-tight manner at least one membrane unit which is arranged inside the hydraulic chamber in flat contact with an inner jacket surface of the hydraulic housing; and an inlet and an outlet provided in the hydraulic housing. At least one crowning is provided at the inner jacket surface and/or at the membrane unit such that a radial gap between the membrane unit and the inner jacket surface is defined by the crowning in a circumferential section of less than 360°, and in particular less than 180°.

The present invention provides a water-pumping device and a hairdressing device. The water-pumping device is connected to a liquid storage device to deliver liquid in the liquid storage device, and includes a chamber for containing the liquid and a squeezing device. Two ends of the chamber are communicated with a first water delivery channel and a second water delivery channel respectively, the first water delivery channel is connected to the liquid storage device, and a wall surface of the chamber is at least partially made of a deformable material, and the squeezing device periodically squeezes the deformable material from one end of the chamber to the other end thereof to make the first water delivery channel pump water and the second water delivery channel deliver water. No hose is provided in the chamber so that the number of components is reduced and the overall structure is simplified.

A conveying device at least for conveying a conveying medium includes at least one conveying space, with at least one conveying space element, which at least partly delimits the conveying space and is embodied in a rigid fashion, and with at least one elastically deformable conveying element which delimits the conveying space together with the conveying space element. The conveying space element includes at least one concave recess for at least partly forming the conveying space, wherein an inner surface of the conveying space element, which delimits the concave recess, forms a wall of the conveying space, wherein the conveying element comprises at least one conveying surface, which is utilizable in targeted fashion for a conveyance of a fluid in the conveying space and/or through the conveying space.

A device providing a dosed supply of a liquid includes: a pump configured to deliver the liquid and having a pump housing with an inlet and an outlet; an eccentric on the pump housing; and a deformable diaphragm between the pump housing and the eccentric, the deformable diaphragm and the pump housing delimiting a delivery path from the inlet to the outlet and forming a seal of the delivery path. The seal is displaceable along the delivery path, by a movement of the eccentric, in a delivery direction from the inlet to the outlet to deliver the liquid. The pump is configured such that within the pump a friction torque that must be overcome for the eccentric to move is greater than a maximum pressure torque that can be generated by pressurized liquid in the delivery path, so as to prevent movement of the eccentric counter to the delivery direction.