Patent ID: 7422567

Claim:
An abrader device for delivering a substance into skin via an abrasion process, said abrader device comprising: a base having a top surface and a bottom surface onto which an abrader surface with microprotrusions is mounted, said microprotrusions are frustroconical protrusions and each protrusion having at least one scraping edge for forming a furrow along a length of the skin; a housing surrounding the base; a handle having a pushbutton projecting from a top surface of the device; wherein said pushbutton has a first detent, wherein said first detent is engagable with a cooperating detent on said base and said detents cooperate to prevent inadvertent movement of said handle with respect to said base wherein said first detent of said pushbutton and said detent on said base hold the pushbutton in a substantially extended position prior to use wherein the pushbutton collapses inside the base when activated, and the base rotates with respect to the housing and proportionally to the push button collapse, thereby causing the abrader surface to rotate against skin when the housing is placed against skin and a spring operably engaged between the handle and the base, wherein movement of the handle causes proportional compression of the spring for controlling the amount of force or pressure applied to the microprotrusions as the abrader surface moves across the skin thereby forming a furrow of a substantially consistent depth along its length.