Abstract: The invention relates to a dispenser (1) for dispensing liquid or pasty materials (M), with a reservoir (2) for the materials, a head piece (3), a pump chamber (27), and an outlet valve (A) and inlet valve (E), wherein the pump chamber (27) is formed as a uniform pump chamber body (5) made of a resilient plastic, and the pump chamber body (5) has a floor attachment section (29) designed as an annular collar. To ensure that a dispenser of the type in question can be easily assembled while having the simplest possible structure, it is first proposed that the outlet valve (A) and/or the inlet valve (E) is composed of a flat part (44) which is separate from but cooperates with the pump chamber body (5) and which, with at any rate partial vertical mobility, bears on the pump chamber body (5). A further aspect of a dispenser of the type in question is that an impression part (22) is provided which is vertically assigned to the floor attachment section (29) and which can be acted on via the head piece (3).

Abstract: Control arrangement for regulating the speed of movement of a hydrostatic energy consumer is provided in which the ratio between pressure supplied and power on the output side is constant, in particular, a piston capable of sliding in a cylinder connected to a pressure main line, characterized in that an initial hydrostatic displacement machine is connected between the pressure main line and the consumer and is coupled with a second hydrostatic displacement machine on the shaft side, the second hydrostatic displacement machine is adjustable with respect to its displacement volume per revolution and is connected on the one hand to the pressure main line and on the other hand to a chamber carrying a lower pressure, where the adjusting element of this second displacement machine is connected with an r.p.m.-regulating device.

Abstract: A control and regulating arrangement for an adjustable hydrostatic unit is provided in which the regulating device has an auxiliary control constant pump in the feed line of which there is a restrictor, in which case the pressure retained in front of the latter acts on a pressure chamber in which a regulating piston capable of sliding against the force of a spring and which influences the position of a regulating piston connected with the final control element of the hydrostatic unit and capable of sliding in a regulating cylinder is capable of sliding, characterized in that the unit is a hydrostatic motor and the auxiliary control pump is connected to its output shaft.

Abstract: A hydrostatic drive system is provided with an adjustable hydraulic motor operatively connected between a high pressure main line and a low pressure line and equipped with a control arrangement that influences the setting in an r.p.m.-dependent manner, the improvement comprising a safety means that limits the stream flowing through the hydraulic motor.