AUTO-INJECTOR ASSEMBLY

摘要

An auto-injector assembly comprises a medicament container defining a substantially cylindrical chamber containing a liquid medicament. A proximal end of the chamber is closed by a piston and a distal end of the chamber is closed by a seal spanning an opening. A biasing means, such as a spring, is coupled to the piston and acts to bias the piston towards the seal, thereby pressurising the liquid medicament. The assembly also comprises a hypodermic needle and a removable needle cap for maintaining the hypodermic needle in sterile conditions until use. A means for establishes fluid communication between the chamber and the hypodermic needle such that the pressurised liquid medicament is automatically delivered through the hypodermic needle when communication has been established.

主权项

1. An auto-injector assembly comprising,
a medicament container defining a substantially cylindrical chamber containing a liquid medicament, a proximal end of the chamber being closed by a piston slidably located within the cylindrical chamber, and a distal end of the chamber being closed by a container seal spanning an opening at a distal end of the medicament container, biasing means coupled to the piston and acting to bias the piston towards the container seal, thereby pressurising the liquid medicament, a hypodermic needle for parenteral administration of the liquid medicament, a removable needle cap for maintaining the hypodermic needle in sterile conditions until use, and means for establishing fluid communication between the chamber and the hypodermic needle such that the pressurised liquid medicament is automatically delivered through the hypodermic needle when communication has been established.