Browse Prior Art Database

Bistable Disk Clamp to Apply Axial Force

IP.com Disclosure Number: IPCOM000038816D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Pocock, L: AUTHOR

Abstract

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.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 67% of the total text.

Page 1 of 2

Bistable Disk Clamp to Apply Axial Force

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. Central dished portion 3 has a central hole 4 to accommodate a clamping screw and washer. Dished portion 3 is designed so that its two-shape states (convex and concave) are mirror images of each other, and deformation is within its elastic limit. Rim 1 is connected to disk 3 by vertical band 5 of reduced section sufficient to transmit the axial clamp forces but flexible enough to accommodate the radial movement of dished portion 3 when in the state of deformation (Fig. 2). This figure shows the dished portion as a plane half way between its convex and concave shapes, in which state the radial stress transmitted to and accommodated by band 5 is at...