EP 0322548 B1 19930714 - BOTTLE STOPPER FOR FREEZE-DRYING
Title (en)
BOTTLE STOPPER FOR FREEZE-DRYING
Publication
Application
Priority
DE 3744174 A 19871224
Abstract (en)
[origin: US4872572A] A lyophilization stopper made of a rubber elastic material is composed of a shank (1) and a circular disc shaped flange (2) made in one piece with the shank. The shank includes a cavity (4) which surrounds the longitudinal axis (A) of the shank and is open toward the free end face (3) of the shank, while extending toward a central closed wall portion (2b) of the flange. A first section (Z1) of the shank disposed between a first transverse plane (Q1) and a second transverse plane (Q2) has a closed outer circumferential face which has a maximum diameter (D). A subsequent second section (Z2) includes a passage which communicates with the cavity as well as a plurality of projecting blocking elements (14a-14c). The inner wall surface (19) which laterally delimits the cavity (4) and has an increasing diameter with increasing approach to the free shank end face lies completely outside a cone (K) whose axis is the longitudinal axis (A) of the shank, whose tip (K1) lies in the transverse plane (Q1) and whose tip angle ( beta ), in degrees, is larger than a value calculated according to the formula -39+75xlg (D), where "D" is the maximum diameter (D) of the first section (Z1) measured in millimeters. In this way, a particularly utilitarian stopper is obtained which does not interfere with the insertion of the hollow extraction needle.
IPC 1-7
IPC 8 full level
B01L 3/14 (2006.01); B65D 39/00 (2006.01); B65D 51/00 (2006.01); B65D 51/24 (2006.01)
CPC (source: EP US)
B01L 3/50825 (2013.01 - EP US); B65D 39/0023 (2013.01 - EP US); B65D 51/002 (2013.01 - EP US); B65D 51/241 (2013.01 - EP US); B65D 2539/005 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0322548 A1 19890705; EP 0322548 B1 19930714; AT E91470 T1 19930715; DE 3744174 A1 19890706; DE 3882350 D1 19930819; US 4872572 A 19891010
DOCDB simple family (application)
EP 88118843 A 19881111; AT 88118843 T 19881111; DE 3744174 A 19871224; DE 3882350 T 19881111; US 28897288 A 19881223