Abstract: A measuring gas pump (1) including a pump housing (2) with a pump chamber (3) inside which is sealed by a working membrane (5). The membrane (5) is connected: by a connecting rod (8) or a similar type of lifting device to a crank mechanism (9). A heating device is provided in the upper area of the pump housing, specifically in the pump head (10). On one hand, in the drive-transmission area between the head of the connecting rod (6) on the membrane side and the crank mechanism (9), there are holes (11) for the reduction of heat transfer to the crank mechanism which are spaced in a longitudinal direction of the connecting rod and which are also diametrically opposed, in peripheral direction, with a resulting reduction in heat conductivity. On the other hand, there is an enlargement of the surface area, at least in the area adjacent to the crank mechanism, for purposes of heat dissipation, specifically through cooling ribs (12).

Abstract: A laboratory pump unit (1) for pipetting, filtering, and exhausting a gaseous or liquid fluid is provided. The laboratory pump unit (1) includes a pump (3), which can be connected on the suction side and/or the pressure side to a pipette (4) or other fluid receiver, for suctioning or ejecting the fluid. The laboratory pump unit includes, among other elements, a secondary tube (9, 10) that is connected to the suction tube and/or pressure tube (6, 7) that is connected to the pipette (4) or fluid receiver on the one hand and the pump (3) on the other hand, and is open to the atmosphere, and includes a throttle (11, 12) for limiting the amount of air drawn in or ejected. The laboratory pump unit (1) is operated in “open” pump operation on the suction side and pressure side with a precisely adjusted tube pressure in the suction tube or pressure tube (6, 7), which cannot be exceeded or fallen below by the pump (3).

Abstract: A multistage device (1) for delivering moist gases is provided. Said device comprises several delivery pumps (2, 3) each of which having a displacer that oscillates inside a delivery space, and being connected in series via a connection channel (6). The inventive device also comprises a ventilation device (7) which has at least one ventilation channel (8), whereby the ventilation channel (8) opens into a connection channel (6) that interconnects series-connected delivery pumps (2, 3). The inventive device (1) is characterized in that a ventilation valve (9), which can be motor-actuated by a control device, is interconnected inside the ventilation channel (8), and said ventilation valve (9) can be actuated as required by means of the control device and independent of the lift position of the displacers.

Abstract: A membrane pump (104) with an operating membrane (1) delimiting a conveying space (2), and a supplemental membrane (3) arranged on the side of the operating membrane (1) facing away from the conveying space (2), with a membrane interspace (4) provided between the operating membrane (1) and the supplemental membrane (3) as well as with a pump drive for oscillating movement of the operating and the supplemental membranes (1, 3) in the same direction. The membrane interspace (3) is joined with at least one suction channel (7) for relieving pressure of the membrane interspace (4). The membrane interspace (4) is pneumatically joined through the at least one suction channel (7) with the suction side of this membrane pump (104). The membrane pump of the invention (104) has a high suction capacity without the problem of buckling of the elastic operating membrane (1) in the intake phase.

Abstract: The invention relates to a process for conveying damp gases by means of a conveyor device (1) and also relates to a conveyor device (1) for carrying out the process. The conveyor device (1) has at least one feed pump (2) with an oscillating reciprocating piston (3) in a delivery chamber (7). In order to dry the conveyor device (1) effectively in the region of the delivery chamber (7), the delivery chamber (7) of at least one feed pump (2) is intermittently ventilated at various intervals in time using an ventilation device (15) while the conveyor device (1) is in operation.

Abstract: A multistage device (1) for delivering moist gases is provided. Said device comprises several delivery pumps (2, 3) each of which having a displacer that oscillates inside a delivery space, and being connected in series via a connection channel (6). The inventive device also comprises a ventilation device (7) which has at least one ventilation channel (8), whereby the ventilation channel (8) opens into a connection channel (6) that interconnects series-connected delivery pumps (2, 3). The inventive device (1) is characterized in that a ventilation valve (9), which can be motor-actuated by a control device, is interconnected inside the ventilation channel (8), and said ventilation valve (9) can be actuated as required by means of the control device and independent of the lift position of the displacers.

Abstract: A measuring gas pump (1) including a pump housing (2) with a pump chamber (3) inside which is sealed by a working membrane (5). The membrane (5) is connected by a connecting rod (8) or a similar type of lifting device to a crank mechanism (9). A heating device is provided in the upper area of the pump housing, specifically in the pump head (10). On one hand, in the drive-transmission area between the head of the connecting rod (6) on the membrane side and the crank mechanism (9), there are holes (11) for the reduction of heat transfer to the crank mechanism which are spaced in a longitudinal direction of the connecting rod and which are also diametrically opposed, in peripheral direction, with a resulting reduction in heat conductivity. On the other hand, there is an enlargement of the surface area, at least in the area adjacent to the crank mechanism, for purposes of heat dissipation, specifically through cooling ribs (12).

Abstract: A reciprocating piston machine (1) with at least one inlet and/or outlet valve that has a strip, tongue or lamella shaped closing member (5). The opening movements (8) of the closing member (5) are limited through a stroke restrictor (6) assigned to each valve. The stroke restrictor (6) has or defines at least one ventilation hole (8) inside the contact area of the closing member (5). This ventilation hole (8) prevents the formation of air cushions (7) between the closing member (5) and the corresponding stroke restrictor (6) effectively. In the absence of the ventilation hole (8), the air cushion (7) can limit the opening movements of the closing member (5) prematurely, which in turn could lead to the generation of additional noise.

Abstract: A pump for gases to be measured having a pump housing in which a pump chamber is located. The pump chamber is sealed off by a working membrane that is connected to a crank drive by a connecting rod or similar lifting mechanism. A heating device is provided in an upper area of the pump housing, particularly in the pump head. Heat insulation covering at least the pump head is provided. The heat insulation is in the form of an insulating housing having an inner wall spaced apart from the pump head in order to form a gas insulation layer.

Abstract: An evaporation system for separation of a fluid mixture into its component parts, especially for the reclamation of solvents, has a vacuum pump connected to the evaporator, especially a rotation evaporator, with at least one separator being connected to the suction side of the vacuum pump and at least one secondary condenser being connected at the pressure side of the vacuum pump. A fine regulating valve (8) is installed in the connecting pipe (7) between the rotation evaporator (2) and the separator (9), which is connected in front of the vacuum pump (10), for regulation of the boiling pressure.

Abstract: A pump stand (1) has a base plate (2) with a pump (3) mountable thereon. The pump (3) has supports (4) serving as its vibration damping elements with which it stands upon the base plate (2). Coupling elements (5) are provided on the pump underside and on the base plate upper side, for coupling the pump (3) and the base plate (2) with each other, whereby the coupling elements essentially engage in the assembled state of the pump without locking. The coupling elements (5) are located at a defined place suitable for pumps of different sizes.

Abstract: A diaphragm pump with a driving motor has arranged in a case (5) at lease one drive (3) for transferring the pump movement to a pump diaphragm (4a). The case (5) of the diaphragm pump is essentially formed by at least one extrusion (6) configured to accommodate the drive(s) (3) and the driving motor (2). The extrusion (6) carries the driving motor (2), the drive(s) (3) and the pump head(s) (4). The extrusion (6) enables the pump case (5) to be specially dimensionally stable, to be manufactured at reasonable price, and has substantially smooth external surfaces. It is therefore easy to clean.

Abstract: A pump stand (1) has a base plate (2) for mounting thereon a pump (3) and at least one of a control unit (6) and a vacuum controller (7). The pump stand (1) has for this purpose a plurality of push-in or snap-in connections (5) enabling pump components or accessory units, particularly the pump (3) itself, to be simply exchanged. By this means a pump stand (1) of straightforward arrangement ensues, which provides a large number of possibilities for variation and can be simply combined with pumps of different type or different output.