Patent ID: 8225658

Claim:
Apparatus comprising: a substrate; a member extending substantially parallel to a surface of the substrate, the member connected to the substrate by at least one resiliently flexible element, the resiliently flexible element having a first end anchored to the substrate and a second end attached to the member; wherein: the member is movable along the surface of the substrate in at least a first direction, the resiliently flexible element has a stiffness in respect of bending about a first bending axis that is transverse to the first direction that is less than a stiffness of the flexible element in respect of bending about a second bending axis that is at right angles to the substrate, wherein the flexible element is deformable to project away from the substrate in response to motion of the member in the first direction and, upon moving the member in the first direction, a first edge of the member or the flexible element is engageable with the surface of the substrate, such that engagement of the first edge with the substrate resists motion of the first edge along the substrate such that the member is held in a configuration such that the member projects away from the surface of the substrate.