Magnetic latching system with inflatable seal

Patent metadata

Field	Value
Publication number	US-9630699-B2
Application number	US-201514621220-A
Country	US
Kind code	B2
Filing date	Feb 12, 2015
Priority date	Feb 12, 2015
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A magnetic latching system is provided for removably latching a panel to an aircraft surface portion. The latching system includes a removable axis panel engageable to a latching land. The panel and land define opposing magnetically attractive surface portions, with a body of magnetic material disposed there between. An inflatable seal is also disposed intermediate the panel and the land. Upon inflation, the inflatable seal is operative to urge the panel away from the land far enough to reconnect magnetic engagement between the panel and the land, sufficient to permit disengagement of the panel from the land.

First claim

What is claimed is:

1. A magnetic latching system for removably latching a panel to an aircraft surface portion, the system comprising:
a removable access panel defining an upper surface, side surfaces, and a panel lower peripheral surface;
a plurality of magnetically attractive panel surface portions disposed proximate at least a portion of the panel lower peripheral surface;
a latching land connectable to the aircraft surface portion, the land defining an upper surface having an outer peripheral portion that is substantially coplanar with the aircraft surface portion, a seating surface for receiving and supporting the panel lower peripheral surface, and land side surfaces;
the land seating surface defining a plurality of magnetically attractive land surface portions disposed along at least a portion of the land panel seating surface;
a body of magnetic material disposed intermediate the magnetically attractive panel surface portions and the magnetically attractive land surface portions, the body of magnetic material being operative to form a magnetic bond between the panel and land to urge the panel into a magnetic engagement with the land seating surface, such that the panel upper surface is substantially coplanar with the aircraft surface portion; and
an inflatable seal disposed intermediate the panel and the land, adjacent the magnetic material, upon inflation the inflatable seal being operative to urge the panel away from the land far enough to weaken magnetic engagement between the panel and the land sufficient to permit disengagement of the panel from the land.

2. The magnetic latching system as recited in claim 1 wherein the inflatable seal is disposed adjacent the panel magnetically attractive surface portions and the land magnetically attractive surface portions.

3. The magnetic latching system as recited in claim 2 wherein the panel side surfaces are beveled inwardly and downwardly from the panel upper surface.

4. The magnetic latching system as recited in claim 3 wherein the land side surfaces are beveled inwardly and downwardly from the land seating surface.

5. The magnetic latching system as recited in claim 4 wherein the inflatable seal is extends intermediate at least one panel side surface and at least one land side surface.

6. The magnetic latching system as recited in claim 1 wherein the inflatable seal extends about the panel side surfaces.

7. The magnetic latching system as recited in claim 1 wherein the inflatable seal extends about the land side surfaces.

8. The magnetic latching system as recited in claim 1 wherein the inflatable seal defines a plurality of inflatable seal segments disposed at spaced locations along the panel seating surface.

9. The magnetic latching system as recited in claim 8 wherein each seal segment is in pneumatic communication with other sealed segments.

10. The magnetic latching system as recited in claim 1 wherein the inflatable seal extends outwardly beyond the magnetic strips.

11. The magnetic latching system as recited in claim 10 wherein the inflatable seal extends intermediate at least one panel side surface and at least one land side surface.

12. The magnetic latching system as recited in claim 1 wherein the magnetically attractive panel surface portions are formed of magnetically attractive material embedded in the panel lower peripheral surface.

13. The magnetic latching system as recited in claim 12 wherein magnetically attractive land surface portions are formed of magnetically attractive material embedded in the land seating surface.

14. The magnetic latching system as recited in claim 1 wherein the panel magnetically attractive panel surface portions comprise of strips of magnetically attractive material secured to the panel lower peripheral surface.

15. The magnetic latching system as recited in claim 14 wherein magnetically attractive land surface portions comprise strips of magnetically attractive material secured to the land seating surface.

16. The magnetic latching system as recited in claim 1 wherein the magnetically attractive panel surface portions define a first thickness and the magnetically attractive land surface portions define a second thickness, and wherein the first thickness is less than the second thickness, such that upon inflation of the seal, the body of magnetic material is separated from the panel lower surface but remains magnetically attached to the land seating surface.

17. The magnetic latching system as recited in claim 1 wherein the magnetically attractive panel surface portions define a first thickness and the magnetically attractive land surface portions define a second thickness, wherein the first thickness is greater than the second thickness, such that upon inflation of the seal, the body of magnetic material is separated from the land seating surface, but remains magnetically attached the panel lower surface.

18. The magnetic latching system as recited in claim 1 wherein the panel is formed of graphite composite material.

19. The magnetic latching system as recited in claim 18 wherein the land is formed of graphite composite material.

20. The magnetic latching system as recited in claim 1 furthering comprising a plurality of shear pins vertically extending between the panel and the land, to maintain horizontal orientation of the panel with respect to the land.

Assignees

• Northrop Grumman Systems Corp

Inventors

• Combs Cory M
• Smith Charles R
• Rufino John

Classifications

• B64C1/1407

  Doors; surrounding frames · CPC title

• E05C19/161 Primary

  magnetic gaskets · CPC title

• B64C1/14 Primary

  Windows; Doors; Hatch covers or access panels; Surrounding frame structures; Canopies; Windscreens {accessories therefor, e.g. pressure sensors, water deflectors, hinges, seals, handles, latches, windscreen wipers}(fairings movable in conjunction with undercarriage elements B64C25/16; bomb doors B64D1/06) · CPC title

• B64C1/1446

  Inspection hatches (for engine cowls B64D29/08) · CPC title

• E05B51/02

  by pneumatic or hydraulic means {(E05B17/0029 takes precedence)} · CPC title