Apparatuses and methods for testing adhesion of a seal to a surface

Patent metadata

Field	Value
Publication number	US-9404848-B2
Application number	US-201414205258-A
Country	US
Kind code	B2
Filing date	Mar 11, 2014
Priority date	Mar 11, 2014
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

One example of the disclosure relates to an apparatus for testing adhesion of a seal to a surface. The apparatus includes a first member and a second member movable relative to the first member. The second member includes a seal-contact member. The apparatus also includes means for biasing the first member and the second member relative to each other with a biasing force and an indicator on one of the first member or the second member.

First claim

What is claimed is:

1. An apparatus for testing adhesion of a seal to a surface, the apparatus comprising: a first member that comprises a first end, a second end, and a cavity therein, wherein the first end of the first member comprises a first aperture therethrough and in communication with the cavity, wherein the second end of the first member includes a second aperture therethrough and in communication with the cavity, wherein the cavity comprises a narrow cavity portion toward the first end and a wide cavity portion toward the second end with a lip between the narrow and wide cavity portions; a second member movable relative to the first member, wherein the second member comprises a plunger that comprises a wide portion, a narrow portion arranged toward the first end of the first member relative to the wide portion of the plunger, and an indicator portion arranged toward the second end of the first member relative to the wide portion of the plunger, wherein the wide portion is arranged in the wide cavity portion of the cavity in the first member, and wherein the second member further comprises a seal-contact member extending from the second member through the first aperture in the first member; means for biasing the first member and the second member relative to each other with a biasing force; and an indicator on the indicator portion of the plunger, wherein the indicator extends out of the second aperture in the second end of the first member when the second member is displaced relative to the first member as the seal-contact member of the second member is urged against at least one of the seal or the surface, wherein different extensions of the indicator out of the second aperture correspond to different states of the indicator, which represent different levels of friction between the seal-contact member of the second member and the at least one of the seal or the surface.

2. The apparatus of claim 1 , wherein the lip in the cavity engages the wide portion of the plunger to limit displacement of the second member relative to the first member.

3. The apparatus of claim 2 , wherein the second member is linearly movable relative to the first member.

4. The apparatus of claim 3 , wherein:
the indicator is in a first state when an external force applied to the second member in a direction opposite to the biasing force is in a first force range;
the indicator is in a second state when the external force is in a second force range, wherein the second force range exceeds the first force range; and
the indicator is in a third state when the external force is in a third force range, wherein the third force range exceeds the second force range.

5. The apparatus of claim 4 , wherein the indicator has a first visual characteristic in the first state, a second visual characteristic in the second state, and a third visual characteristic in the third state, and wherein the first visual characteristic, the second visual characteristic, and the third visual characteristic are different.

6. The apparatus of claim 5 , wherein the indicator is not observable in the first state, is partially observable in the second state, and is fully observable in the third state.

7. The apparatus of claim 4 , wherein the indicator has a first auditory characteristic in the first state, a second auditory characteristic in the second state, and a third auditory characteristic in the third state, and wherein the first auditory characteristic, the second auditory characteristic, and the third auditory characteristic are different.

8. The apparatus of claim 1 , wherein the seal-contact member is an elastic member.

9. The apparatus of claim 1 , wherein the first member includes a body portion and a cap portion, wherein first portion defines a first part of the cavity and the cap portion defines a second part of the cavity, wherein internal threads in the body portion includes threadingly engage external threads on the cap portion, and wherein the second aperture is disposed through the cap.

10. The apparatus of claim 9 , wherein the seal-contact member includes a nose portion and a coupling portion opposite the nose portion; and
further comprising a coupling member engaged with the first end of the second member, wherein the coupling member includes a cavity that engages the coupling portion of the seal contact member.

11. The apparatus of claim 1 , wherein the seal-contact member includes a nose portion and a coupling portion opposite the nose portion; and
further comprising a coupling member engaged with the first end of the second member, wherein the coupling member includes a cavity that engages the coupling portion of the seal contact member.

12. A method of testing adhesion of a seal to a surface, the method comprising: applying a force to a first member of a testing apparatus, the testing apparatus including: the first member that comprises a first end, a second end, and a cavity therein, wherein the first end of the first member comprises a first aperture therethrough and in communication with the cavity, wherein the second end of the first member includes a second aperture therethrough and in communication with the cavity, wherein the cavity comprises a narrow cavity portion toward the first end and a wide cavity portion toward the second end with a lip between the narrow and wide cavity portions; a second member movable relative to the first member, wherein the second member comprises a plunger that comprises a wide portion, a narrow portion arranged toward the first end of the first member relative to the wide portion of the plunger, and an indicator portion arranged toward the second end of the first member relative to the wide portion of the plunger, wherein the wide portion is arranged in the wide cavity portion of the cavity in the first member, and wherein the second member further comprises a seal-contact member extending from the second member through the first aperture in the first member; means for biasing the first member and the second member relative to each other with a biasing force; and an indicator on the indicator portion of the plunger, wherein the indicator extends out of the second aperture in the second end of the first member when the second member is displaced relative to the first member as the seal-contact member of the second member is urged against at least one of the seal or the surface, wherein different extensions of the indicator out of the second aperture correspond to different states of the indicator, which represent different levels of friction between the seal-contact member of the second member and the at least one of the seal or the surface; wherein the force is transmitted to the second member via the means for biasing, and wherein the seal-contact member transmits the force to the seal; and indicating an amount of the force applied to the seal based on displacement of the second member relative to the first member.

13. The method of claim 12 , further comprising: causing the indicator to be in a first state when the force applied to the seal is in a first range; causing the indicator to be in a second state when the force applied to the seal is in a second range, wherein the second range exceeds the first range; and causing the indicator to be in a third state when the force applied to the seal is in a third range, wherein the third range exceeds the second range.

14. The method of claim 13 , wherein:
causing the indicator to be in the first state comprises causing the indicator to have a first visual characteristic;
causing the indicator to be in the second state comprises causing the indicator to have a second visual characteristic;

Assignees

• Boeing Co

Inventors

• Kesterson Matthew G
• Shin Jane
• Gage Roger A

Classifications

• G01N3/307

  generated by a compressed or tensile-stressed spring; generated by pneumatic or hydraulic means · CPC title

• G01N19/04 Primary

  Measuring adhesive force between materials, e.g. of sealing tape, of coating · CPC title

• G01M99/007

  by applying a load, e.g. for resistance or wear testing (G01M99/001 takes precedence; testing the elasticity of structures G01M5/00) · CPC title