Patent ID: 7976477

Claim:
A bodily fluid sampling device, comprising: an incision forming member adapted to form an incision in skin; an expression member defining an expression opening configured to express fluid from the incision; a reference member defining an aperture through which the incision forming member extends when forming the incision, the reference member having a reference surface received in the expression opening during formation of the incision to contact the skin and limit penetration depth of the incision forming member into the skin; a retraction mechanism coupled to the reference member to retract the reference surface from the expression opening; a housing connected to the expression member; and wherein the retraction mechanism includes a sleeve slidably received around the housing, a cam arm pivotally coupled to the housing, the cam arm engaging the sleeve and the reference member to retract the reference surface of the reference member from the expression opening when the sleeve slides towards the skin, and a lock mechanism to lock the reference member in a retracted position in which the reference surface is retracted from the skin.