Dispenser for media

US5884819A · kind A · utility

Assignee

• Caideil M.P. Teoranta · IE

Inventors

• Karl-Heinz Fuchs · Radolfzell, DE
• Hans Merk · Radolfzell, DE

Key dates

• Filing date: Feb 19, 1997
• Grant date: Mar 23, 1999
• Expiry date: Feb 19, 2017

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B05B11/1061
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A dispenser (1) comprises for its plunger chamber (13) an outlet valve (20) which after opening on the actuating stroke continues to remain open for a time during the subsequent return stroke due to a delay means (30) so as to ensure a more or less complete venting or filling of the plunger chamber (13). At the end of the delay period the closure maintained in the open position position by friction surface areas (37, 38) is released and automatically jumps back into its closed position. After venting, the effectiveness of the delay means (30) diminishes so that in normal operation substantially only a pressure dependent opening and closing of the outlet valve (20) is provided for.