Bistable Disk Clamp to Apply Axial Force
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
A bistable disk clamp of elastic material consists of a central dished portion connected to a thick vertical rim by a thinner deformable band. The disk clamp has two stable states (convex and concave), while the rim diameter always remains constant. When the dished portion is deformed by an axial clamping force, its radial movement is accommodated by deformation of the deformable band. An undesirable feature of existing disk clamps having a dish shape is that when an axial clamping force is applied, the diameter of the clamp face increases and induces a radial stress in the clamped disk. Fig. 1 shows the clamp in its initial first-state shape and its second-state shape after vertical axial stress and deformation. The clamp has an outer thick rim 1 with a lower planar clamp face 2.