Claims for Patent: 5,716,338

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Summary for Patent: 5,716,338

Title:	Dual-chamber type injection cartridge with bypass connection
Abstract:	An injection cartridge (1) of the dual-chamber type having a bypass connection (12) between its two chambers (9, 10) which is arranged such that the interior wall of the cartridge is modified in a predetermined area in such a way that the movable wall (11) between the two chambers does not seal completely against the interior wall in said area. The modification of the wall is arranged as a plurality of lands and grooves (12) which have a direction that is inclined in relation to the longitudinal axis of the cartridge barrel.
Inventor(s):	Birger Hjertman, Bohdan Pavlu
Assignee:	Pfizer Health AB
Application Number:	US08/448,607
Patent Claims:

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