Injection device

摘要

An injection device includes a housing (40) for containing a syringe or cartridge (14) of medicament; a rotary drive shaft (20) for being rotated by an adjustable preset amount to cause expression of a corresponding amount of medicament from the syringe or cartridge; a torsion drive spring (24) anchored at one end region relative to the drive shaft (20) and, at its other end region being secured to a fitting (44) adapted to non-rotatably engage a seat (48, 50) on the housing.

主权项

1. An injection device, comprising:
a housing for containing a syringe or cartridge of medicament; a rotary drive shaft for being rotated by an adjustable preset amount to cause expression of a corresponding amount of medicament from said syringe or cartridge in use; and a torsion drive spring i) at a first end region anchored relative to said drive shaft and, ii) at an opposite, second end region secured to a fitting adapted to non-rotatably engage a seat on said housing.