Media dispenser with elastically deformable plunger

US5316198A · kind A · utility

Assignee

• Ing. Erich Pfeiffer GmbH & Co KG · DE

Inventors

• Karl-Heinz Fuchs · Radolfzell, DE
• Lothar Graf · Rielasingen-Worblingen, DE

Key dates

• Filing date: Mar 27, 1992
• Grant date: May 31, 1994
• Expiry date: Mar 27, 2012

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05B11/0044
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

For restoring purposes, a discharge apparatus (1) has a gas spring (53) and for the displacement of dead volumes a filling body (70) which, like two valve bodies (23, 54) movable against one another of two valves (21, 55) with different functions, can be formed by a single component. An exposed operating ram or plunger (20), which surrounds an outlet channel (19) and is contact-free over most of its length, is constructed in one piece with a pump piston (17) and a nozzle core (48) of an outlet opening (8), while being directly connected to the spring (53). This gives high operational reliability of the discharge apparatus (1) with a simple construction.