Patent ID: 8998849
Filing Date: 2015-04-07
Classification: A61M

Abstract:
1. A medical injector, comprising: a medicament container configured to be coupled to a needle and contain a medicament, the medicament container including a spherical piston defining a first radius of curvature and dividing the medicament container into a first portion containing the medicament and a second portion, the spherical piston adapted to force the medicament from the medicament container; a non-manual actuator including a drive element configured to apply a movement force; and an adapter coupled to the medicament container and the non-manual actuator, the adapter including a proximal end portion configured to engage the drive element and a distal end portion coupled to the proximal end portion and including a spherical surface having a second radius of curvature equal to the first radius of curvature, the spherical surface configured to engage the spherical piston, the distal end portion defining an outer diameter sized to slide within the medicament container, wherein when the drive element applies a movement force to the proximal end portion of the adapter, the distal end portion of the adapter slides within the medicament container and drives the spherical piston, which thereby forces the medicament from the medicament container to inject the medicament into a patient.