Impact indicator

• US 9,217,683 B2
• Filed: 05/23/2013
• Issued: 12/22/2015
• Est. Priority Date: 03/10/2011
• 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.
• Assistant Examiner(s): COURSON, TANIA C
• Application Number:
  US13/900,690
• Publication Number:
  US 20130247814A1
• Time in Patent Office: 943 Days
• Field of Search: 116/200, 116/201, 116/203, 116/211, 116/212, 116/215, 73/120.1, 73/120.4, 73/120.5, 73/120.6, 73/120.9, 73/121.3
• US Class Current: 1/1
• CPC Class Codes: G01L 23/00 Devices or apparatus for measuring or indicating or recording rapid changes, such as oscillations, in the pressure of steam, gas, or liquid; Indicators for determining work or energy of steam, internal-combustion, or other fluid-pressure engines from the condition of the working fluid
• CPC Class Codes: G01L 5/00 Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
• 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: G01N 3/30 by applying a single impulsive force, e.g. by falling weight
• CPC Class Codes: G01P 15/00 Measuring acceleration; Measuring deceleration; Measuring shock, i.e. sudden change of acceleration
• CPC Class Codes: G01P 15/02 by making use of inertia forces using solid seismic massesG01P15/14 takes precedence
• CPC Class Codes: G01P 15/03 by using non-electrical means
• CPC Class Codes: G01P 15/036 for indicating predetermined acceleration values
• CPC Class Codes: G01P 15/04 for indicating maximum value
• CPC Class Codes: H01H 35/14 Switches operated by change of acceleration, e.g. by shock or vibration, inertia switch wherein the liquid constitutes a contact of the switch H01H29/002
• CPC Class Codes: H01H 9/16 Indicators for switching condition, e.g. "on" or "off"

Abstract

A device and technique for impact detection and indication includes a housing; a mass member located within the housing, the housing configured to enable movement of the mass member from a first position to a second position within the housing in response to receipt by the housing of an acceleration event; and first and second biasing members disposed within the housing and biased toward each other to retain the mass member in the first position. In response to receipt by the housing of the acceleration event, the mass member is configured to overcome the biasing force of the first biasing member and move from the first position to the second position, and wherein the first and second biasing members each comprises a leaf spring member having a length greater than a width of the mass member and disposed transversely to a direction of movement of the mass member.

Claims

1. An impact indicator, comprising:

a housing;

a mass member located within the housing, the housing configured to enable movement of the mass member from a first position to a second position within the housing in response to receipt by the housing of an acceleration event; and

first and second biasing members disposed within the housing and biased toward each other to retain the mass member in the first position, and wherein, in response to receipt by the housing of the acceleration event, the mass member is configured to overcome the biasing force of the first biasing member and move from the first position to the second position, and wherein the first and second biasing members each comprises a leaf spring member having a length greater than a width of the mass member and disposed transversely to a direction of movement of the mass member.

2. The impact indicator of claim 1, wherein, in response to receipt by the housing of the acceleration event, the first and biasing members are biased in a same direction to bear upon the mass member to retain the mass member in the second position.

3. The impact indicator of claim 1, wherein the housing comprises a window to enable a visual indication of movement of the mass member indicating that the housing has experienced the acceleration event.

4. The impact indicator of claim 1, wherein, in response to receipt by the housing of another acceleration event that causes the mass member to overcome the bias of the first and second biasing members, the first and second biasing members are configured to cause the mass member to move from the second position, past the first position, to a third position.

5. The impact indicator of claim 4, wherein the housing comprises a window located in each of the second and third positions to enable a visual indication of the mass member located in either the second or third position.

6. The impact indicator of claim 4, wherein the first and second biasing members are biased in a same direction to bear upon the mass member to retain the mass member in the third position.

7. An impact indicator, comprising:

a housing;

a mass member located within the housing, the housing configured to enable movement of the mass member from a first position to a second position within the housing in response to receipt by the housing of an acceleration event; and

first and second biasing members disposed within the housing and biased toward each other to retain the mass member in the first position, and wherein, in response to receipt by the housing of the acceleration event, the mass member is configured to overcome the biasing force of the first biasing member and move from the first position to the second position; and

wherein the housing comprises a plurality of sidewalls forming a translation path for movement of the mass member from the first position to the second position, and wherein each end of the first and second biasing members is disposed in a respective seat located in the sidewalls when the mass member is in the first position.

8. The impact indicator of claim 7, wherein, in response to receipt by the housing of the acceleration event, the second biasing member is drawn out of its respective seats in the sidewalls and is prevented from returning to its seats in the sidewalls by indents formed in the sidewalls.

9. The impact indicator of claim 7, wherein, in response to receipt by the housing of the acceleration event, the first and second spring members are biased in a same direction to bear upon the mass member to retain the mass member in the second position.

10. The impact indicator of claim 7, wherein, in response to receipt by the housing of another acceleration event that causes the mass member to overcome the bias of the first and second biasing members, the first and second biasing member are configured to cause the mass member to move from the second position, past the first position, to a third position.

11. The impact indicator of claim 10, wherein the housing comprises a window located in each of the second and third positions to enable a visual indication of the mass member located in either the second or third position.

12. The impact indicator of claim 10, wherein the first and second biasing members are biased in a same direction to bear upon the mass member to retain the mass member in the third position.

13. An impact indicator, comprising:

a housing;

a mass member located within the housing, the housing configured to enable movement of the mass member from a first position to a second position within the housing in response to receipt by the housing of an acceleration event; and

first and second biasing members disposed within the housing and biased toward each other to retain the mass member in the first position, and wherein, in response to receipt by the housing of the acceleration event, the mass member is configured to overcome the biasing force of the first biasing member and move from the first position to the second position, and in response to receipt by the housing of the acceleration event, the first and second biasing members are biased in a same direction to bear upon the mass member to retain the mass member in the second position, and wherein, in response to receipt by the housing of another acceleration event that causes the mass member to overcome the bias of the first and second biasing members, the first and second biasing members are configured to cause the mass member to move from the second position, past the first position, to a third position.

14. The impact indicator of claim 13, wherein the housing comprises a window located in each of the second and third positions to enable a visual indication of the mass member located in either the second or third position.

15. The impact indicator of claim 13, wherein the first and second biasing members are biased in a same direction to bear upon the mass member to retain the mass member in the third position.

16. The impact indicator of claim 13, wherein the first biasing member bears against a first wall of the mass member and the second biasing member bears against a second wall of the mass member to retain the mass member in the first position.

17. The impact indicator of claim 16, wherein the first and second walls comprise arcuately formed walls.

18. The impact indicator of claim 16, wherein the first and second walls comprise opposing arcuately formed walls.

19. The impact indicator of claim 13, wherein the first biasing member is configured to invert from a first biasing position to a second biasing position in response to movement of the mass member from the first position within the housing to the second position within the housing.

20. The impact indicator of claim 19, wherein the first biasing member is configured to invert from the second biasing position to a third biasing position in response to movement of the mass member from the second position within the housing to the third position within the housing.