Abstract: The invention relates to a dispenser for delivering portions of liquid to pasty substances, having a storage container and a pumping chamber, the pumping chamber having at least one valve, and having a delivery head which can be displaced relative to the storage container and the displacement of which allows the substance to be delivered, the delivery head further having formed in it a delivery channel with a delivery opening, which delivery opening can be closed by a closure part which is removable, but is held in captive fashion on the delivery head. In order to specify such a dispenser for delivering portions of liquid to pasty substances which is configured in an advantageous manner, in particular, in respect of a closure part, it is proposed that the closure part is a sliding part which also forms a delivery-channel portion and interacts with a fixed closure pin.

Abstract: The invention relates to a dispenser (1) for discharging liquid to pasty materials. The dispenser comprises a pump head (2) and a pump chamber (8) which is embodied therein and is provided with a pump chamber wall (20), an inlet valve (26) and a discharge valve (11). The dispenser (1) further comprises a reservoir (3) which contains a storage bag (4) whose volume can be reduced so as to empty the same. In order to obtain an advantageous design regarding vibrations or sudden pressure increases in the material, the pump chamber wall (20) of the pump head (2) is configured in a flexible manner.

Abstract: The invention relates to a dispenser for delivering portions of liquid to pasty substances, having a storage container and a pumping chamber, the pumping chamber having at least one valve, and having a delivery head which can be displaced relative to the storage container and the displacement of which allows the substance to be delivered, the delivery head further having formed in it a delivery channel with a delivery opening, which delivery opening can be closed by a closure part which is removable, but is held in captive fashion on the delivery head. In order to specify such a dispenser for delivering portions of liquid to pasty substances which is configured in an advantageous manner, in particular, in respect of a closure part, it is proposed that the closure part is a sliding part which also forms a delivery-channel portion and interacts with a fixed closure pin.

Abstract: A metering pump made of plastic for the metered dispensing of liquid and/or pasty media from a bottle-like container, can-like container or tube-like container with a follower piston. A pump chamber delivering the medium is connected via a suction valve with the container and has as the pumping member an elastic bellows that forms the pump chamber and is arranged between a dimensionally stable lower housing part and a likewise dimensionally stable upper housing part that is telescopically movable in relation thereto. The upper housing part has the discharge opening, which is connected via a discharge channel and a discharge valve with the pump chamber. The bellows has an upper ring collar sealingly surrounding a ring wall of the upper housing part. The ring wall is provided with a displacement piston that has a smaller diameter and protrudes into the bellows.

Abstract: An automatic closure for elastically deformable, tube-like or bottle-like containers of pasty or liquid media has a dispensing opening (5), which is arranged in a front wall (3) of a hood cover and can be closed by an axially movable closing member (8). The closing member (8) is part of an elastic membrane wall (9) of an elastic, hood-like hollow body (10). This hollow body surrounds a ring wall (12) of a chamber (15), which is closed by a bottom (13), through which the medium flows and is provided with a ventilating channel. To make possible a sufficient suction ventilation of the container in a simple manner, the inner ring wall is surrounded by a second ring wall, which forms an annular groove (17) with the inner ring wall (12). The annular groove (17) has at least one axial ventilating opening (30, 31), which connects the ventilating channel (28,29) to the hollow space (27) surrounded by the second ring wall (16).

Abstract: A metering pump dispenser for simultaneous metered dispensing of liquid and/or pasty media has at least two separate storage chambers (1, 2), which are arranged in a common pump housing (9) and with which separate metering pumps with a priming valve and a dispensing valve each are associated. The metering pumps can be actuated by a common actuating member, which is mounted axially movably in the head part of the pump container and has one or more dispensing channels.