Patent ID: 7690423

Claim:
An extendable component of a downhole tool for use in a wellbore traversing subsurface formations and defining a wellbore wall, the extendable component comprising: a drive element defining an axis and having a distal end; an abutment spaced radially from the drive element distal end; a driven element flexibly coupled to the drive element and defining a driven element axis, the driven element having a proximal end disposed adjacent to the drive element and a distal end; a tilt arm coupled to the driven element, disposed at an angle with respect to the driven element axis, and configured to engage the abutment, the driven element being moveable between a normal position, in which the driven element axis is substantially parallel to the drive element axis, and a tilted position, in which the tilt arm engages the abutment so that the driven element axis is disposed at an angle with respect to the drive element axis; and a contact head coupled to the driven element distal end and adapted to engage the wellbore wall.