초록 ▼

The discharge pump of a discharge apparatus for flowable media is provided with a ventilating channel for the ventilation of the active substance dispenser and the resulting ventilation connection along the channel passes through a bacteria filter. The filter is arranged on a casing of the pump disp

The discharge pump of a discharge apparatus for flowable media is provided with a ventilating channel for the ventilation of the active substance dispenser and the resulting ventilation connection along the channel passes through a bacteria filter. The filter is arranged on a casing of the pump disposed within the reservoir, the filter facing an opening on the casing for the ventilating passage, at a slight spacing from the pump casing. Thus, bacteria which otherwise could penetrate with the ventilating air passing along the ventilating channel from the discharge pump into the reservoir, is held back within the discharge pump.

대표청구항 ▼

A discharge apparatus for fluid media, comprising: a manually-operated discharge pump, for mounting on a container defining a fluid reservoir in an assembled condition of the pump and container, said discharge pump having a pump casing projecting at least by an immersing part into the fluid reservoi

A discharge apparatus for fluid media, comprising: a manually-operated discharge pump, for mounting on a container defining a fluid reservoir in an assembled condition of the pump and container, said discharge pump having a pump casing projecting at least by an immersing part into the fluid reservoir in the assembled condition, the pump casing being bounded on curved outer surfaces by a casing wall, the outer surfaces being substantially curved around a pump axis, a ventilating duct for the fluid reservoir being provided in said discharge pump and issuing at a venting opening in the casing wall of said immersing part; and, a bacteria filter provided on the pump casing, traversing a part of said ventilating duct, said bacteria filter having a ring-like sealing part surrounding an effective filter section, an air inlet side and an air outlet side and being mounted with the sealing part against one of the curved outer surfaces of the casing wall of said immersing part, said ring-like sealing part projecting from at least the inlet side of said bacteria filter and sealing the effective filter section at a substantially constant spacing from said one of the outer surfaces of the casing wall with respect to this outer surface, the bacteria filter thereby being curved around said pump axis and bounding a part of the fluid reservoir with the discharge pump and reservoir in the assembled condition, said effective filter section being arranged free of contact on both the inlet and outlet sides, said bacteria filter and an adjacent outer surface of said casing wall defining a filter inlet chamber, said venting opening traversing said outer surface opposite to the bacteria filter and being substantially smaller than a boundary of said filter inlet chamber defined by the ring-like sealing part of the bacteria filter.