Apparatus for installing a seal cap

• US 9,188,226 B2
• Filed: 07/15/2013
• Issued: 11/17/2015
• Est. Priority Date: 07/15/2013
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Pajel, Carissa Ann, Burgess, Robert Marshall
• Primary Examiner(s): ESTREMSKY, GARY WAYNE
• Application Number:
  US13/941,915
• Publication Number:
  US 20150014933A1
• Time in Patent Office: 855 Days
• Field of Search: 411/372.5, 411/375, 411/429, 411/82, 411/82.3, 411/372.6, 411/373, 156/60, 156/91, 156/92, 156/538
• US Class Current: 1/1
• CPC Class Codes: F16B 33/004 Sealing; Insulation by means of washers F16B43/001
• CPC Class Codes: F16B 37/14 Cap nuts; Nut caps or bolt caps
• CPC Class Codes: F16J 15/02 between relatively-stationary surfaces F16J15/46, F16J15/48 take precedence
• CPC Class Codes: F16J 15/04 without packing between the surfaces, e.g. with ground surfaces, with cutting edge

Abstract

A method and apparatus for installing a seal cap. The seal cap may be adhered to a fastener element using a material. A portion of the material may be squeezed out as excess material in response to adhering the seal cap to the fastener element. A number of projections associated with the seal cap may be moved along an interface formed between the seal cap and an object in which the fastener element has been installed. The excess material may be faired using the number of projections as the number of projections is moved along the interface between the seal cap and the object.

Claims

1. An apparatus comprising:

a seal cap configured to be adhered to and sealed to a fastener element; and

a plurality of projections attached to and extending radially outward from an outer surface of the seal cap in which the plurality of projections is configured to fair excess material around the seal cap when the plurality of projections is moved along an interface formed between the seal cap and an object in which the fastener element has been installed, wherein each of the plurality of projections comprises a surface configured to contact the excess material as the plurality of projections is moved along the interface between the seal cap and the object, wherein the surface has a curved shape defining a channel between each of the plurality of projections and the outer surface of the seal cap, wherein the curved shape is configured to ensure that the excess material is faired to have a desired thickness.

2. The apparatus of claim 1, wherein the plurality of projections is moved along the interface by rotating the seal cap such that the plurality of projections is rotated along the interface between the seal cap and the object.

3. The apparatus of claim 2, wherein the seal cap is configured to be rotated using a tool configured to be operated by one of a human operator and a robotic operator.

4. The apparatus of claim 1, wherein the seal cap is adhered to the fastener element using a material and wherein the excess material is a portion of the material that squeezes out around the seal cap when the seal cap is adhered to the fastener element.

5. The apparatus of claim 4, wherein the material is selected from one of a sealant material and an adhesive material.

6. The apparatus of claim 1, wherein each of the plurality of projections has a shape selected such that the excess material is smoothed out when the plurality of projections is moved along the interface between the seal cap and the object.

7. The apparatus of claim 6, wherein the shape is a cross-sectional shape that is a curved shape.

8. The apparatus of claim 1, further comprising:

a first projection of the plurality of projections extending away from a center axis through the seal cap to a first distance relative to the center axis; and

a second projection of the plurality of projections extending away from the center axis through the seal cap to a second distance relative to the center axis, wherein the first distance and the second distance are different.

9. The apparatus of claim 1, wherein the surface has a texture configured to smooth out any portion of the excess material in contact with the surface as the plurality of projections is moved along the interface between the seal cap and the object.

10. The apparatus of claim 1, wherein the curved shape is configured to create a gradual slope of excess material between the object in which the fastener element has been installed and the outer surface of the seal cap when the plurality of projections is moved along the interface formed between the seal cap and the object in which the fastener element has been installed.

11. A unitary seal cap comprising:

an inner surface defining a hollow portion within the seal cap configured to receive a fastener element, the inner surface configured to be adhered to and sealed to the fastener element using a sealant material in which at least a portion of the sealant material squeezes out and around the seal cap as excess sealant material;

an outer surface defining an exterior surface of the seal cap; and

a plurality of curved projections attached to and extending from the outer surface of the seal cap in which the plurality of curved projections is configured to fair the excess sealant material around the seal cap when the plurality of curved projections is moved along an interface formed between the seal cap and an object in which the fastener element has been installed, wherein each of the plurality of curved projections comprises;

a surface configured to contact the excess material as the plurality of projections is moved along the interface between the seal cap and the object, wherein the surface comprises;

a texture configured to smooth out any portion of the excess material in contact with the surface as the plurality of projections is moved along the interface between the seal cap and the object; and

a curved shape defining a channel between each of the plurality of projections and the outer surface of the seal cap, wherein the curved shape is configured to ensure that the excess material is faired to have a desired thickness.

12. The unitary seal cap of claim 11, wherein the curved shape is configured to create a gradual slope of excess material between the object in which the fastener element has been installed and the outer surface of the seal cap when the plurality of projections is moved along the interface formed between the seal cap and the object in which the fastener element has been installed.