Patent ID: 8105347

Claim:
A single-use blade lancet device, comprising: a body comprising a rear end and a front end that includes a blade tip opening; a trigger at least one of associated with the body and mounted to the body; a blade member movably mounted within the body and comprising a front end and a rear end; the blade member being movable at least between a first retracted position, an extended position, and a second retracted position; a biasing arrangement that biases the blade member from the first retracted position towards the extended position and then towards the second retracted position; and a guiding arrangement which guides the blade member while the blade member moves from the first retracted position towards the extended position and then towards the second retracted position, wherein, during movement of the blade member, the guiding arrangement ensures that blade member maintains an orientation which is substantially parallel to an axis extending from the blade tip opening to the rear end of the body, and wherein, during the movement of the blade member, the blade member at least one of: has a side edge whose distance from the axis changes; has a side edge whose distance from the axis increases between the first and second retracted positions; and has a first side edge that moves toward the axis and a second side edge that moves away from the axis.