EP 1207969 B1 20041229 - VENTILATION DEVICE FOR A PISTON FOR A CARTRIDGE
Title (en)
VENTILATION DEVICE FOR A PISTON FOR A CARTRIDGE
Title (de)
ENTLÜFTUNGSVORRICHTUNG BEI EINEM KOLBEN FÜR EINE KARTUSCHE
Title (fr)
DISPOSITIF DE PURGE DANS LE CAS DU PISTON D'UNE CARTOUCHE
Publication
Application
Priority
- DE 20010417 U 20000609
- EP 0103221 W 20010321
Abstract (en)
[origin: WO0194028A1] The invention relates to a ventilation device for a piston for a cartridge, comprising a first piston part (1) which rests sealingly against the cartridge wall and a second piston part (4, 24), which forms a valve (9, 10) together with the first piston part (1). Said valve opens when a pressure is exerted on the rear side of the piston so that the air that is trapped between the filling composition and the piston can escape. According to the invention, a filter section (14) is provided in front of the valve (9, 10), between the two piston parts (1; 4, 24), as seen from the flow path of the air through the valve (9, 10). This filter section has at least one narrow channel which forms a penetration barrier for the filling mass and ensures that the valve remains dry and free of dirt.
IPC 1-7
IPC 8 full level
B05C 17/005 (2006.01); B05C 17/01 (2006.01)
CPC (source: EP US)
B05C 17/00576 (2013.01 - EP US); B05C 17/00579 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
DE 20010417 U1 20011011; DE 50104959 D1 20050203; EP 1207969 A1 20020529; EP 1207969 B1 20041229; EP 1207969 B2 20070704; US 6598766 B1 20030729; WO 0194028 A1 20011213
DOCDB simple family (application)
DE 20010417 U 20000609; DE 50104959 T 20010321; EP 0103221 W 20010321; EP 01913897 A 20010321; US 4828202 A 20020128