Patent ID: 7572269
Filing Date: 2009-08-11
Classification: A61B

Abstract:
1. A medical skin piercing device, comprising: a barrel; a lancet holder for holding a lancet in a forward part of the barrel to allow a tip of a lancet to advance from a retracted position to a projecting position, the lancet holder being moveable between a first forward position and a first rearward position; bias means configured to bias the lancet holder rearwardly; a hammer moveable between a second rearward position and a second forward position, and operable to engage said lancet holder in momentum transfer relationship; a barrier to the rear of the hammer, configured to be axially adjusted by a user within the barrel by cam action as a result of rotation; a spring acting between the barrier and the hammer, the spring being compressed to a degree determined by an axial adjustment of the barrier within the barrel; and a trigger mechanism for holding the hammer in said second rearward position, and releasing the hammer from said second rearward position, wherein, upon release of the hammer, the hammer is propelled by said spring to impact upon said lancet holder, a propelling force being dependent on a user-set degree of compression of the spring.