Quick response particle damper for printed circuit boards and planar surfaces

• US 10,021,779 B1
• Filed: 11/28/2017
• Issued: 07/10/2018
• Est. Priority Date: 11/28/2017
• Status: Active Grant

• Current Assignee: The Topline Corporation (Steven Madden Ltd.)
• Original Assignee: The Topline Corporation (Steven Madden Ltd.)
• Inventors: Hart, Martin B.
• Primary Examiner(s): Thompson, Timothy
• Assistant Examiner(s): Alonzo Miller, Rhadames J
• Application Number:
  US15/824,915
• Time in Patent Office: 224 Days
• Field of Search: 174135
• CPC Class Codes: H05K 1/0271 Arrangements for reducing stress or warp in rigid printed circuit boards, e.g. caused by loads, vibrations or differences in thermal expansion
• CPC Class Codes: H05K 1/181 associated with surface mounted components
• CPC Class Codes: H05K 2201/2045 Protection against vibrations

Abstract

An apparatus and system for attaining quick response to vibration damping of a printed circuit board (PCB) or other planar surface utilizing a defined travel displacement of a single spherical tungsten (or other material) ball in a single or plurality of sealed spherical chambers in a particle impact damper (PID). The single spherical tungsten (or other material) ball is not weighed down, constrained, encumbered or influenced by other spherical balls within the chamber; accordingly, providing unrestricted freedom for the ball to quickly respond at the first occurrence of excessive vibrational acceleration over 1G. The structure of a single spherical particle within a sealed spherical chamber also provides a path of minimum distance for the ball to travel before colliding with the ceiling or side walls of the PID chamber. A plurality of spherical chambers can be arranged in a variety of patterns within the PID housing such as desired. The PID housing can be any shape such as a cube, a rectangular cuboid, a cylinder, sphere, triangular tetrahedron, triangular prism, polygon, toroid or any combination of shapes.

Claims

1. A particle impact damper for use with printed circuit boards, comprising:

a housing having one or more separate spherically shaped chambers, each spherically shaped chamber defined by one or more curved surfaces that surround an open cavity of the chamber;

one or more particles, each particle disposed in one of the one or more the spherically shaped chambers, the spherically shaped chamber having a diameter that is at least 7% larger than a diameter of the particle,

wherein the one or more particles are configured to move unconstrained within the one or more spherically shaped chambers to contact the one or more curved surfaces to dampen a vibration force applied to the particle impact damper or a component attached to the particle impact damper.

2. The particle impact damper of claim 1, wherein the one or more particles is a plurality of particles and the one or more spherically shaped chambers is a plurality of spherically shaped chambers, each of the particles being individually housed in one of the plurality of spherically shaped particles.

3. The particle impact damper of claim 2, wherein the plurality of spherically shaped chambers are aligned in a single row.

4. The particle impact damper of claim 2, wherein the plurality of spherically shaped chambers are stacked in a plurality of rows.

5. The particle impact damper of claim 2, wherein the plurality of spherically shaped chambers are arranged in symmetrical or asymmetrical packing patterns.

6. The particle impact damper of claim 1, wherein the housing has one of a cube shape, a rectangular cuboid shape, a toroidal shape, and a cylindrical shape.

7. The particle impact damper of claim 1, wherein the housing comprises one of a plastic, a ceramic, and a metal material.

8. The particle impact damper of claim 1, wherein the particles comprise one of a metal, a plastic, a liquid or a powder.

9. The particle impact damper of claim 8, wherein the one or more particles comprise a tungsten material.

10. A particle impact damper, in combination with a printed circuit board, comprising:

a housing defining a plurality of separate storage chambers therein;

a plurality of spherical particles, each spherical particle disposed and configured to move within one of the plurality of storage chambers;

wherein an effective diameter of each of the storage chambers is greater than an effective diameter of the spherical particle disposed in the storage chamber to thereby provide a damping performance of the particle impact damper on the printed circuit board.

11. The combination of claim 10, wherein the housing has one of a cube shape, a rectangular cuboid shape, a toroidal shape, and a cylindrical shape.

12. The combination of claim 10, wherein said plurality of storage chambers are spherically shaped.

13. The combination of claim 10, wherein the plurality of storage chambers is arranged in one or more stacked rows.

14. The combination of claim 10, wherein said storage chambers are arranged in symmetrical or asymmetrical packing patterns.

15. The combination of claim 10, wherein the housing comprises one of a plastic, a ceramic, and a metal material.

16. The particle impact damper of claim 10, wherein the particles comprise one of a metal, a plastic, a liquid or a powder.

17. The combination of claim 10, wherein the one or more chambers has an effective diameter at least 7% larger than an effective diameter of the spherical particle.

18. The combination of claim 10, wherein the plurality of spherical particles comprise tungsten.

19. The combination of claim 10, wherein the housing comprises a top plate, a middle plate and a bottom plate coupleable to each other to define the housing, at least one of the storage chambers defined at least in part by a cavity in the middle plate.

20. The combination of claim 10, wherein the printed circuit board assembly comprises a planar surface on which the particle impact damper is mounted.

21. The combination of claim 10, wherein the collective mass of the plurality of spherical particles is greater than 7% of the combined mass of the printed circuit board assembly populated with components.