EP 1461268 A4 20090325 - DISPENSING CARTRIDGE WITH TORTUOUS VENT PATH
Title (en)
DISPENSING CARTRIDGE WITH TORTUOUS VENT PATH
Title (de)
ABGABEPATRONE MIT GEWUNDENER LÜFTUNGSBAHN
Title (fr)
CARTOUCHE DE DISTRIBUTION AVEC CIRCUIT D'AERATION SINUEUX
Publication
Application
Priority
- US 0239041 W 20021206
- US 33893501 P 20011210
- US 34808802 P 20020111
Abstract (en)
[origin: WO03050012A1] A dispensing cartridge (20) in accordance with the present invention is relatively simple in configuration while minimizing leakage of the fluid (28) and eliminating problems associated with chemical attack of the O-ring (112) by the fluid (28) in the dispensing cylinder (22). The air vent (41) is configured as a tortuous path, which in a pre-staged position allows air to freely escape along the spiral path along the circumference of the plug (26). As the piston (24) contacts the fluid (28), the forward motion of piston (24) is resisted by the high backpressure created by the small effective diameter and relatively long length of the spiral path. Once the piston (24) contacts the fluid (28), the spiral plug (26) is pushed into the piston (24) closing the spiral path. By controlling the fluid flow, the amount of fluid backflow through the piston (24) is minimized if not eliminated, thus eliminating the need for an annular overflow chamber. To improve the sealing of the piston (24) within the dispensing cartridge (20), the piston (24) may be provided with one or more radially extending sealing lips (64, 66) that can be used in lieu of or in conjunction with an O-ring (112).
IPC 1-7
IPC 8 full level
B65D 83/00 (2006.01); B05C 17/005 (2006.01)
CPC (source: EP)
B05C 17/00579 (2013.01); B65D 83/0005 (2013.01); B65D 2205/04 (2013.01)
Citation (search report)
- [XY] DE 20010417 U1 20011011 - SULZER CHEMTECH AG WINTERTHUR [CH]
- [DYA] US 5400926 A 19950328 - KELLER WILHELM A [CH]
- [DYA] US 5178305 A 19930112 - KELLER WILHELM A [CH]
- [A] US 5150823 A 19920929 - SUGITA KOICHI [JP]
- [DA] US 4951848 A 19900828 - KELLER WILHELM A [CH]
- See references of WO 03050012A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
DOCDB simple family (publication)
WO 03050012 A1 20030619; AU 2002351268 A1 20030623; EP 1461268 A1 20040929; EP 1461268 A4 20090325
DOCDB simple family (application)
US 0239041 W 20021206; AU 2002351268 A 20021206; EP 02786916 A 20021206