05437398 is referenced by 2 patents and cites 15 patents.

In a discharge apparatus (1) the restoring spring (21) of a restoring system (20) for a discharge pump (7) and for valves (26,30) is positioned, separated from the medium, in a tightly closed spring chamber (22). The medium inlet (31) into the discharge pump (7) is positioned eccentrically thereto and issues into an external, annular presuction chamber (15) from which the medium passes via an intermediate valve (30) into the pump chamber (39). This avoids contact between the medium and metallic parts and this gives both favorable flow paths for the medium and a compact pump construction.

Title
Media dispenser with isolated pump restoring system
Application Number
788560
Publication Number
5437398
Application Date
August 16, 1993
Publication Date
August 1, 1995
Inventor
Stefan Ritsche
Radolfzell
DE
Agent
Quarles & Brady
Assignee
Ing Erich Pfeiffer & Co KG
DE
IPC
B67D 5/42
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