Impact indicator

• US 9,587,998 B2
• Filed: 08/21/2015
• Issued: 03/07/2017
• Est. Priority Date: 06/10/2011
• Status: Active Grant

• Current Assignee: Shockwatch Incorporated (Media Recovery, Inc.)
• Original Assignee: Shockwatch Incorporated (Media Recovery, Inc.)
• Inventors: Branch, Clinton A.
• Primary Examiner(s): Smith, R. A.
• Application Number:
  US14/832,746
• Publication Number:
  US 20150355041A1
• Time in Patent Office: 564 Days
• Field of Search: 116/200, 116/203, 734/92, 735/09
• US Class Current: 1/1
• CPC Class Codes: G01L 5/0052 measuring forces due to impact G01L5/0061, G01L5/14 take precedence; impact testing of structures G01M7/08; impact testing of material G01N3/00
• CPC Class Codes: G01P 15/036 for indicating predetermined acceleration values
• CPC Class Codes: G01P 15/038 by using fluidic means

Abstract

An impact indicator includes a first member having a reservoir for holding an indicator fluid; a second member couplable to the first member; and a third member disposed between an opening of the reservoir and the second member. Responsive to receiving a predetermined level of impact, at least a portion of the indicator fluid exits the reservoir, and wherein the third member causes the portion of the indicator fluid to be distributed across a surface of the first member adjacent the opening and facing the third member, the portion of the indicator fluid located on the surface of the first member providing a visual indication of the received predetermined level of impact.

Claims

1. An impact indicator, comprising:

a first member having a reservoir for holding an indicator fluid;

a second member couplable to the first member; and

a third member disposed between an opening of the reservoir and the second member; and

wherein, responsive to receiving a predetermined level of impact, at least a portion of the indicator fluid exits the reservoir, and wherein the third member causes the portion of the indicator fluid to be distributed across a surface of the first member adjacent the opening and facing the third member, the portion of the indicator fluid located on the surface of the first member providing a visual indication of the received predetermined level of impact.

2. The impact indicator of claim 1, wherein the indicator fluid comprises a synthetic hydraulic fluid.

3. The impact indicator of claim 1, wherein the indicator fluid comprises a silicone oil fluid.

4. The impact indicator of claim 1, wherein the indicator fluid comprises a propylene glycol fluid.

5. The impact indicator of claim 1, wherein an internal bore size of the reservoir and a viscosity of the indicator fluid are selected to obtain a desired activation sensitivity for the predetermined level of impact.

6. The impact indicator of claim 1, wherein the third member comprises a flexible member.

7. The impact indicator of claim 1, wherein the second member comprises a material enabling visibility of the indicator fluid when located on the surface of the first member.

8. The impact indicator of claim 1, wherein the viscosity of the indicator fluid is between 20 and 80 centistokes.

9. The impact indicator of claim 1, wherein the third member comprises a material enabling visibility of the indicator fluid when located on the surface of the first member.

10. An impact indicator, comprising:

a first member having a reservoir for holding an indicator fluid;

a second member couplable to the first member; and

a third member disposed at least partially between the first and second members; and

wherein, responsive to receiving a predetermined level of impact, the indicator fluid moves from the reservoir to an interface formed by opposing surfaces of the first and third members located adjacent to the opening of the reservoir, the indicator fluid wicking into the interface to provide a visual indication of the received predetermined level of impact.

11. The impact indicator of claim 10, wherein the second member comprises a material enabling visibility of the indicator fluid when the indicator fluid is within the interface.

12. The impact indicator of claim 10, wherein the indicator fluid comprises at least one of a synthetic hydraulic fluid, a silicone oil fluid and propylene glycol fluid.

13. The impact indicator of claim 10, wherein a diameter of the reservoir and a viscosity of the indicator fluid are selected to obtain a desired activation sensitivity for the predetermined level of impact.

14. The impact indicator of claim 10, wherein the viscosity of the indicator fluid is between 20 and 80 centistokes.

15. The impact indicator of claim 10, wherein, responsive to the indictor fluid entering the interface, the indicator fluid migrates toward a peripheral boundary of the interface.

16. The impact indicator of claim 15, wherein the indicator fluid migrates in at least two different directions from the opening toward the peripheral boundary of the interface.

17. The impact indicator of claim 10, wherein the third member comprises a material enabling visibility of the indicator fluid when located in the interface.