Abstract: A two-chamber metering dispenser 1 for liquid and/or paste-like media is equipped with two containers 2, 3 made of plastic, which are arranged in parallel positions next to one another and are provided each with a hand-operated metering pump and with a follower piston. The follower piston is tightly in contact over the entire circumference of the inner surface of the containers. In order to optimally utilize the hollow space in the case of an elliptical outer cross-sectional shape, and to guarantee a tight contact between the follower piston and the inner surfaces of the container walls, the two containers 2, 3 form a common outer jacket 10, which has an elliptical cross-sectional shape, and the containers are separated from one another by two middle walls 14, 15, which are arched against each other symmetrically to the short axis 12 of the ellipse.

Abstract: A dispensing pump (1) made of plastic for dispensing metered amounts of paste-like media includes a bottle-, can- or tube-like container (60), with an elastic bellows (4) acting as a pumping member, which is connectingly arranged between an upper housing part (2) and a telescopingly movable, lower housing part (3), which is coaxial thereto, and whose interior (32) forms a pump chamber. Its upper end section (38) is connected to an annular wall (35) of the upper housing part (2). Its lower end section (45) is in sealing contact with an annular shoulder (46) of a radial partition (19) of the lower housing part (3).

Abstract: In a metering and spray pump for liquid, low-viscosity and pasty substances, an elastic bellows 3 is arranged between two plastic housing parts 1, 2 that are telescopingly movable relative to one another, connecting them. The bellows, acting as a discharge valve 18, has, at one end, a valve annular wall 15 that surrounds the generated surface 17 of an inner annular discharge seat 8 made in one piece with the first housing part 1 in a sealing manner and such that it can be lifted off. As a suction valve 58, the bellows 3 has, at its other end, a valve annular wall 54 which is in sealing and separable contact with the generated surface 43 of a valve seat 42 made in one piece with the second housing part 2 such that it can be lifted off, and the medium to be pumped is drawn into the bellows 3 through the valve seat.

Abstract: The metering pump dispenser serves for simultaneous metered output of liquid and/or pasty media from at least two separate supply chambers (18, 19), which are arranged in a common pump housing (2) and to which are assigned individual separate metering pumps (5, 6), each with an intake and output valve (23, 24). The metering pumps are manually driven by a common actuating device (3), which extends on the side of actuation in a common front side of the metering pumps (5, 6) that are present and is provided with one or more output channels (57, 58). Metering pumps (5, 6) each have as pump devices communication bellows (21, 22) which are joined on the housing side with pump housing (2) and on the output side with the common actuating device (3). Actuating device (3) is a lever-type device mounted in a swiveling manner around a swivel seat (11) on one side in a head part (10) of pump housing (2) axially projecting over supply containers (18, 19), for conducting limited pump strokes.

Abstract: Suction and/or discharge valves are provided in a metering and spray pump for liquid or low-viscosity, especially pasty substances, in which two housing parts, which are telescopingly movable relative to one another and are made of a dimensionally stable plastic, have a pump chamber, whose volume can be cyclically altered by a pump member. To provide a valve which can be used both as a suction valve and as a discharge valve and consists of the simplest possible functional parts that can easily be assembled and operate reliably even in the case of relatively wide dimensional tolerances, and which especially has a good quality of closing at low opening force, which can be tested even in the dry state, e.g.