RETAINERS

Abstract

A retainer suitable for use on an aircraft is disclosed. The retainer comprises a first retainer part and a second retainer part. The first retainer part comprises a catch and a damper; in which the catch comprises one or more magnetic elements. The damper comprises a damping material, the damping material damps shock impulses; and the catch is supported on the damper.

Claims

1. A retainer suitable for use on an aircraft, the retainer comprising a first retainer part and a second retainer part; the first retainer part comprises a catch and a damper; in which the catch comprises one or more magnetic elements; the damper comprises a damping material, the damping material damps shock impulses; and the catch is supported on the damper.

2. The retainer according to claim 1 in which at least one of the magnetic elements is one of a permanent magnet, a neodymium magnet and a samarium-cobalt magnet.

3. The retainer according to claim 1 in which at least one magnetic element is formed from a ferromagnetic material.

4. The retainer according to claim 1 in which the first retainer part further comprises a layer of a damping material that overlies the one or more magnetic elements, and that damping material damps shock impulses.

5. The retainer according to claim 1 in which the second retainer part comprises a catch plate; and the catch plate comprises at least one magnetic catch element.

6. The retainer according to claim 5 in which at least one of the magnetic catch elements is one of a permanent magnet, a neodymium magnet and a samarium-cobalt magnet.

7. The retainer according to claim 5 in which at least one of the magnetic catch elements is a formed from a ferromagnetic material.

8. The retainer according to claim 5 in which the second retainer part further comprises a layer of a damping material that overlies at least part of the one or more magnetic catch elements, and that damping material damps shock impulses.

9. The retainer according to claim 1 in which the damping material of one or more of the damper, the layer which overlies the one or more magnetic elements, and the layer which overlies the one or more magnetic catch elements comprises an elastomer.

10. The retainer according to claim 9 in which the elastomer comprises one of a natural rubber, a synthetic rubber, and a silicone rubber.

11. The retainer according to claim 1 in which the first and the second retainer parts are so configured that, the magnetic elements and the magnetic catch elements are magnetically attracted to each other when the retainer is in use and the magnetic elements and the magnetic catch elements at least partially overlie each other.

12. The retainer according to claim 1 in which the damper comprises first and second end faces; the first end face is adapted to support or incorporate the at least one magnetic element, and the second end face is adapted to abut a structure to which the first retainer part is attached; the first and the second end faces are so oriented relative to each other that when the second end face is abutting the structure, the first end face may be orientated so that it is parallel to the face of the second retainer part when the first and the second retainer parts are in use and in contact with each other.

13. The retainer according to claim 1 in which the damper is so configured that the damper material is sufficiently dimensioned that the expected maximum shock impulses will not damage the damper, and the damper will not reach a maximum linier elastic deformation under compression when subject to the maximum anticipated shock impulses.

14. An aircraft comprising a mobile structure, a fixed structure, and at least the one retainer according to claim 1 in which the first retainer part is attached to one of a fixed structure and a moving structure; the second retainer part is attached to the other of the fixed structure and the moving structure; and the first and the second retainer parts are so located that the first and the second retainer parts abut each other when the moving structure is moved to a position next to the fixed structure.

15. The aircraft according to claim 14 in which the moving structure is one of a door or a step.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The present invention will be further described and explained by way of example with reference to the accompanying drawings in which

[0032] FIG. 1 shows a schematic embodiment of an aircraft which includes at least two retainers according to the present disclosure;

[0033] FIG. 2 shows a schematic detail of part of a bulkhead, floor and step in the aircraft of FIG. 1 when the step is in an open position;

[0034] FIG. 3 shows a schematic sectional view of part of a bulkhead, floor, and step of FIG. 2 when the step is in a closed position;

[0035] FIG. 4 shows a schematic and perspective view of an embodiment of a first part of a retainer according to the present disclosure;

[0036] FIG. 5 shows a schematic sectional view of the first part of the retainer of FIG. 4;

[0037] FIG. 6 shows a schematic and perspective view of an embodiment of a second part of a retainer according to the present disclosure; and

[0038] FIG. 7 shows a schematic sectional view of the second part of the retainer of FIG. 6.

DETAILED DESCRIPTION

[0039] With reference to FIG. 1, an aircraft 2 comprises a body 4 and first and second wings 6.

[0040] With reference to FIGS. 2 and 3, within the body 4 of the aircraft 2 is a bulkhead 8 extending upwardly from a floor 10. A step 12 is attached to the bulkhead 8 by a pair of hinges 14. The hinges 14 are so configured that the step 12 can be moved between an open or deployed position in which the step 12 extends in a direction substantially parallel to the floor 10 (as shown in FIG. 2), and a closed or stowed position in which the step 12 is parallel or approximately parallel to the bulkhead 8 (as shown in FIG. 3).

[0041] Attached to the bulkhead 8 are two first retainer parts 16. Attached to the step 12 are two second retainer parts 18. The first and second retainer parts 16, 18 are respectively so located on the wall 8 and step 12 that when the step 12 is in the closed or stowed position each first retainer part 16 is in contact with a second retainer part 18.

[0042] With reference to FIGS. 4 and 5, each first retainer part 16 is comprised of a damper 24 which has a first end 24A and a second end 24B. Set into the first end 24A of the damper 24 are first and second magnetic elements 20, 22. The first and second magnetic elements 20, 22 are, in the illustrated example, permanent magnets, for example neodymium magnets or samarium-cobalt magnets.

[0043] The first and second magnetic elements 20, 22 are cylindrical with the longitudinal axis of each cylinder extending in a direction approximately perpendicular to the first end face 24A of the damper 24. The first and second permanent magnets 20, 22 are so configured that their poles at the axial ends of the magnets.

[0044] The first and second end faces 24A, 24B of the damper 24 are, in the illustrated embodiment, approximately parallel to each other. In other, non-illustrated embodiments the first and second end faces are not approximately parallel. In some embodiments, the first and second end faces are so oriented relative to each other that when the second end face is flat against the bulkhead, the first end face is parallel to the face of the step or the face of the second retainer part attached to the step when the step is in the closed position.

[0045] The damper 24 is formed from an elastomeric material, for example a silicone rubber.

[0046] The damper 24 is so configured that the distance between the first and second magnetic elements 20, 22 and the second end face 24B of the damper 24 is such that the expected maximum shock impulse from any impact experienced by the damper 24 will not damage the damper 24, and the damper will not reach its maximum linier elastic deformation under compression when subject to the maximum anticipated shock impulse.

[0047] Overlying the first end surface 24A of the damper 24 and the first and second magnetic elements 20, 22 is a layer 26 of damping material.

[0048] Extending from the second end 24B of the damper 24 is a mounting element 28. The mounting element 28 is partially embedded within the damper 24 and is thus attached to the damper 24. In some non-illustrated embodiments the mounting element 28 is integral with the damper 24. In other non-illustrated embodiments, the mounting element 28 is attached to the damper 24 by other known methods, for example by an adhesive or a mechanical fixing means.

[0049] The mounting element 28 is adapted to engage with the bulkhead 8, and the bulkhead 8 adapted to engage with the mounting element 28. For example, the bulkhead 8 may define an internally threaded bore, the mounting element 28 has the form of an externally threaded bar, and the internal and external threads are adapted to engage with each other.

[0050] With reference to FIGS. 6 and 7, the second retainer element 18 is formed from a magnetic catch element 30 which is surrounded by a layer of damping material 32. The magnetic catch element 30 is formed from a material which is a ferromagnetic material, for example iron or a carbon steel. Each second retainer element 18 is attached to the step 12 using an adhesive (not shown).

[0051] In some non-illustrated examples of the present disclosure each first latch element comprises one or at least three magnetic elements.

[0052] In some non-illustrated examples of the present disclosure each second latch element comprises a plurality of magnetic catch elements.

[0053] In some non-illustrated examples of the present disclosure each of the or each magnetic element in the first retainer element is a permanent magnet for example a neodymium magnet or a samarium-cobalt magnet, and the or each magnetic catch element in the second retainer element is a permanent magnet, for example a neodymium magnet or a samarium-cobalt magnet. In such examples the or each magnetic element and the or each magnetic catch element are so orientated that the or each magnetic element and the or each magnetic catch element are magnetically attracted to each other.

[0054] In some non-illustrated examples of the present disclosure the or each magnetic element in the first retainer element is formed from a ferromagnetic material, for example iron or a carbon steel, and the or each magnetic catch element in the second retainer element is a permanent magnet, for example a neodymium magnet or a samarium-cobalt magnet.

[0055] The above description is meant to be exemplary only, and one skilled in the art will recognize that changes may be made to the embodiments described without departing from the scope of the disclosure. Still other modifications which fall within the scope of the present disclosure will be apparent to those skilled in the art, in light of a review of this disclosure.

[0056] Various aspects of the apparatus disclosed in the various embodiments may be used alone, in combination, or in a variety of arrangements not specifically discussed in the embodiments described above. This disclosure is therefore not limited in its application to the details and arrangement of components set forth in the foregoing description or illustrated in the drawings. For example, aspects described in one embodiment may be combined in any manner with aspects described in other embodiments. Although particular embodiments have been shown and described, it will be obvious to those skilled in the art that changes and modifications may be made without departing from this invention in its broader aspects. The scope of the following claims should not be limited by the embodiments set forth in the examples, but should be given the broadest reasonable interpretation consistent with the description as a whole.