Patent ID: 6048336
Filing Date: 2000-04-11
Classification: A61M

Abstract:
An injection device, comprisinga housing and a fluid container therein;an expressing member longitudinally movable within the housing for expressing injection fluid from said fluid container;an actuating member associated with the expressing member and longitudinally movable within said housing between a proximal and a distal end position for longitudinal displacement of said expressing member within said housing;a plunger disposed in said fluid container and axially aligned with said expressing member;and a position-dependent connecting means between said actuating member and said expressing member, said connecting means being disabled in said distal end position of said actuating member and enabled in a position range adjacent said distal end position and including said proximal end position of said actuating member;wherein the expressing member is biased in the proximal direction by a force, which is smaller than a detachment force of said plunger disposed in the fluid container, so that, when said actuating member is in said distal end position and said connecting means is disabled, said biasing force moves the expressing member into abutment with the plunger, without pushing the plunger into the fluid container; and further comprisinga compression spring located between, and generating said biasing force between, said housing and said expressing member.