Laminated damping device for a carrier and a method for making the same

• US 6,371,433 B2
• Filed: 12/16/1999
• Issued: 04/16/2002
• Est. Priority Date: 05/27/1998
• Status: Expired due to Fees

• Current Assignee: International Business Machines Corporation
• Original Assignee: International Business Machines Corporation
• Inventors: Anderson, Dale H., Connelly, Donald M. Jr., Green, Kenton C.
• Primary Examiner(s): Ramirez, Ramon O
• Assistant Examiner(s): Le, Tan
• Application Number:
  US09/464,568
• Publication Number:
  US 20020014561A1
• Time in Patent Office: 852 Days
• Field of Search: 248/562, 248/636, 248/638, 248/560, 267/47, 267/153, 188/268, 428/304.4, 428/317.9, 428/308.4, 428/306.6, 361/725, 361/679, 361/727, 360/97.01, 360/97.02, 312/223.1, 312/223.2
• US Class Current: 248/562
• CPC Class Codes: F16F 15/073 using only leaf springs
• CPC Class Codes: G11B 33/08 Insulation or absorption of undesired vibrations or sounds
• CPC Class Codes: G11B 33/128 of the plurality of recording/reproducing devices, e.g. disk drives, onto a chassis

Abstract

A damping device with a top element, a bottom element, and a viscoelastic element between the top and bottom elements. The damping device exerts significant shear displacement across the viscoelastic element upon deflecting. The damping device may have first and second ends and an intermediate portion between the first and second ends. The damping device may have a generally longitudinal extension with an elevation in the direction of the top element in the intermediate portion. The elevation may have a substantially triangular V-shape when the damping device is unloaded. A system in accordance with the principles of the present invention including a system cabinet, a plurality of carriers mounted in the system cabinet for receiving hard disk drives, and a plurality of damping devices according to the invention mounted between the carriers and the system cabinet. A method of making a damping device including laminating a viscoelastic element between a top element and a bottom element and providing the damping device with a shape by which the damping device exerts significant shear displacement across the viscoelastic element upon deflecting.

Claims

1. A damping device suitable for attaching to a carrier to be installed in a chassis, comprising:

a top element, a bottom element, and a viscoelastic element disposed between the top and bottom elements, wherein corresponding segments of the top element, the bottom element and the viscoelastic element are arranged to collectively form first, second and third distinct vertices producing a substantially V-shaped portion when the damping device is unloaded, and wherein the damping device exerts significant shear displacement across the viscoelastic element upon deflecting, and wherein the second vertex of the damping device, when engaging a bump in the chassis, restrains the carrier from inadvertently moving out of the chassis.

2. The damping device of claim 1, wherein the top and bottom elements are made of stainless steel.

3. The damping device of claim 1, wherein the viscoelastic element comprises a damping adhesive.

4. The damping device of claim 1, wherein the damping device comprises a first end, a second end, and an intermediate portion between the first and second ends, wherein the damping device has a generally longitudinal extension with an elevation in the direction of the top element to form the substantially V-shaped portion in the intermediate portion.

5. The damping device of claim 1, wherein the elevation in the intermediate portion is located closer to the first end than to the second end.

6. The damping device of claim 1, wherein the elevation in the intermediate portion deforms to produce a rounded V-shape when the damping device is loaded.

7. The damping device of claim 4, wherein a height of the elevation in the intermediate portion is about 3.6 millimeters when the damping device is unloaded.

8. The damping device of claim 4, wherein a height of the elevation in the intermediate portion is about 4.5 millimeters when the damping device is unloaded.

9. The damping device of claim 4, wherein the second end further includes an opening for mounting of the damping device.

10. The damping device of claim 4, wherein the elevation provides a static force of 6 pounds.