Impact indicator

• US 9,103,734 B2
• Filed: 03/09/2012
• Issued: 08/11/2015
• 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
• Application Number:
  US13/415,936
• Publication Number:
  US 20120227463A1
• Time in Patent Office: 1,250 Days
• Field of Search: 116/203, 116200-201, 116211-212, 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

According to one aspect of the present disclosure, a device and technique for impact detection is disclosed. The impact indicator includes a housing and a mass member located within the housing. The housing is configured to enable movement of the mass member from a first position to a second position within the housing in response to receipt of an acceleration event by the housing. The impact indicator also includes a spring member disposed within the housing and configured to bias the mass member to the first position, and wherein in response to receipt by the housing of the acceleration event, the mass member is configured to overcome the bias and move from the first position to the second position. The mass member is configured to rotate within the housing in the second position to enable retention of the mass member in the second position.

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 of an acceleration event by the housing; and

a spring member disposed within the housing and configured to bias the mass member to the first position, and wherein in response to receipt by the housing of the acceleration event, the mass member is configured to overcome the bias and move from the first position to the second position; and

wherein the mass member comprises an eccentric pivot member to cause rotation of the mass member within the housing in the second position to enable retention of the mass member in the second position.

2. The impact indicator of claim 1, wherein the housing comprises first and second internal support posts, the first support post having a length greater than a length of the second support post to facilitate rotation of the mass member in the second position.

3. The impact indicator of claim 1, wherein the spring member comprises a leaf spring having a length greater than a width of the mass member and disposed transversely to a direction of movement of the mass member.

4. The impact indicator of claim 3, wherein the leaf spring extends between an eccentric pivot member of the mass member and a wall of the mass member.

5. The impact indicator of claim 1, wherein the housing comprises a window to enable a visual indication of the mass member located in the second position.

6. The impact indicator of claim 1, 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 at least one of the sidewalls includes a latch element configured to engage a corresponding latch element formed on the mass member to retain the mass member in the second position in response to receipt by the housing of another acceleration event in an opposite direction.

7. The impact indicator of claim 1, wherein the housing comprises a first latch element located proximate to a first side of the mass member and a second latch element located proximate to a second side of the mass member opposite the first side and offset from the first latch element, the first and second latch elements configured to engage corresponding latch elements located on the mass member to retain the mass member in the second position in response to the housing receiving another acceleration movement in an opposite direction.

8. 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 a first acceleration event;

a spring member disposed within the housing and configured to bias the mass member to the first position, and wherein in response to receipt by the housing of the first acceleration event, the mass member overcomes the bias and moves from the first position to the second position; and

a first latch element located proximate to a first side of the mass member and a second latch element located proximate to a second side of the mass member opposite the first side and offset from the first latch element, at least one of the first and second latch elements configured to engage a corresponding latch element located on the mass member to retain the mass member in the second position in response to the housing receiving a second acceleration event in a direction opposite the first acceleration event.

9. The impact indicator of claim 8, wherein the housing comprises first and second internal support posts, the first support post having a length greater than a length of the second support post to cause rotation of the mass member within the housing in the second position.

10. The impact indicator of claim 8, wherein the spring member comprises a leaf spring having a length greater than a width of the mass member and disposed transversely to a direction of movement of the mass member.

11. The impact indicator of claim 8, wherein the housing comprises a window to enable a visual indication of the mass member located in the second position.

12. The impact indicator of claim 8, wherein the housing comprises first and second sidewalls located on opposite sides of the mass member forming a translation path for the mass member to move from the first position to the second position, and wherein the first and second latch elements are disposed on the respective first and second sidewalls.

13. An impact indicator, comprising:

a housing;

a mass member located within the housing, the housing having a plurality of sidewalls forming a translation path 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

a spring member disposed within the housing and configured to bias the mass member to the first position, and wherein in response to receipt by the housing of the acceleration event, the mass member moves from the first position to the second position and the spring member bears on the mass member to cause rotation of the mass member in the second position to facilitate retention of the mass member in the second position; and

wherein at least one of the sidewalls is configured to engage a portion of the mass member to retain the mass member in the second position in response to receipt by the housing of another acceleration event in an opposite direction.

14. The impact indicator of claim 13, wherein the spring member comprises a leaf spring disposed transversely to a direction of movement of the mass member, the leaf spring bearing on the mass member in the second position to cause rotation of the mass member in the second position.

15. The impact indicator of claim 14, wherein the leaf spring extends between adjacent facing portions of the mass member.

16. The impact indicator of claim 14, wherein the leaf spring extends between an eccentric pivot member of the mass member and a wall of the mass member.

17. The impact indicator of claim 13, wherein the housing comprises a window to enable a visual indication of the mass member located in the second position.

18. The impact indicator of claim 13, wherein the spring member biases the mass member in the second position against a portion of the housing to cause rotation of the mass member in the second position.

19. The impact indicator of claim 18, wherein the portion of the housing comprises offset surface portions.