PUMP DISPENSER

A pump dispenser for metered removal of a liquid from a container includes a housing for placement on the container to form a metering chamber, a rising tube connected to the metering chamber, and a pump head movable relative to the housing along a longitudinal axis of the dispenser to carry out a pump stroke. The pump dispenser has a piston secured to the pump head that is movable in the metering chamber to convey the liquid, a dispenser opening is connected to the metering chamber through which metered liquid can leave the pump dispenser, a spring that resets the pump head relative to the housing, and a valve that defines a conveying direction of the liquid from the rising tube into the dispenser opening and that blocks a conveying process in the opposite direction. The spring has a plurality of rings connected by respective connecting webs.