Patent ID: 8153254

Claim:
A structured solid having a contact surface, said contact surface comprising: a structure having a multitude of projections, each projection having a foot part and a head part; wherein each head part has a front surface which faces away from the contact surface, the contact surface being formed by a totality of the front surfaces of the multitude of projections; wherein the contact surface is adapted to adhere to a surface of another object by van der Waals forces without establishing an anchorage and without interlocking of the projections; wherein the projections are elastic and inclined in relation to the contact surface, and wherein each of the projections has a radial gradient of modulus of elasticity in the foot part, whereby the modulus of elasticity gradually decreases in a radial direction through the bulk of the projection starting from the axial center of the foot part to the outer surface of the foot part; and wherein the front surfaces of the multitude of projections provide said adherence to the surface of another object by van der Waals forces without an adhesive.