Energy-absorbing device, structure forming a mounting for an aircraft seat having such a device, and seat having such a structure
First Claim
1. An energy-absorbing device interposed between the front foot and the rear foot of a structure forming a mounting of an aircraft seat, in such a way that, when the structure is deformed in the event of a shock, the device undergoes at least one longitudinal compressive force, comprising a substantially elongate one-piece element, each end of which is associated respectively with one of the feet,3 in that said element comprises a first portion which shape is predetermined in such a way that this element undergoes a natural general structural plastic deformation according to a mode of deformation prescribed by said predetermined shape of said first portion, and in that said element comprises a second portion arranged so as to oppose the general structural plastic deformation of the element and to undergo a natural plastic bending deformation by buckling from a predetermined value of the longitudinal compressive force applied between said ends of said element.
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Accused Products
Abstract
An energy absorbing device for an aircraft seat supporting structure providing an elongate one piece element pivotably connected to front and rear seat supporting legs and having a general crescent shape with two curved arm portions of opposite convexities separated by a space arranged in a central portion of the crescent shape.
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Citations
36 Claims
- 1. An energy-absorbing device interposed between the front foot and the rear foot of a structure forming a mounting of an aircraft seat, in such a way that, when the structure is deformed in the event of a shock, the device undergoes at least one longitudinal compressive force, comprising a substantially elongate one-piece element, each end of which is associated respectively with one of the feet,3 in that said element comprises a first portion which shape is predetermined in such a way that this element undergoes a natural general structural plastic deformation according to a mode of deformation prescribed by said predetermined shape of said first portion, and in that said element comprises a second portion arranged so as to oppose the general structural plastic deformation of the element and to undergo a natural plastic bending deformation by buckling from a predetermined value of the longitudinal compressive force applied between said ends of said element.
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16. A structure forming a mounting for an aircraft seat, comprising;
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an energy-absorbing device; a front foot; and a rear foot, said energy absorbing device interposed between the front foot and the rear foot; and
wherein the device undergoes at least one longitudinal compressive force, when the structure is deformed in the event of a shock, wherein the device comprises a substantially elongate one-piece element, each end of which is associated respectively with one of the feet, in that said element comprises a first portion which shape is predetermined in such a way that this element undergoes a natural general structure plastic deformation according to a mode of deformation prescribed by said predetermined shape of said first portion, and in that said element comprises a second portion arranged so as to oppose the general structural plastic deformation of the element and to undergo a natural plastic bending deformation by buckling from a predetermined value of the longitudinal compressive force applied between said ends of said element.
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- 17. A structure forming a mounting for an aircraft seat, associated in an anchored manner with the fixed structure of the craft, by means of at least one front anchorage of a front foot and by means of at least one rear anchorage of a rear foot, the front and rear feet being associated with a framework of the seat, in a normal position the front foot extending at least substantially vertically from the lower front anchorage thereof, especially perpendicularly to the floor of the craft, the front and rear feet being articulated at the respective upper ends thereof on the framework of the seat, so as to be capable of pivoting about horizontal and transverse pivot axes, the structure comprising an energy-absorbing device associated with an upper part of the rear foot, but at a distance from an upper rear articulation, and associated with the lower front anchorage and in the vicinity or at the lower front anchorage, wherein the energy-absorbing device undergoes at least one longitudinal compressive force, when the structure is deformed in the event of a shock, wherein the device comprises a substantially elongate one-piece element, in that said element comprises a first portion which shape is predetermined in such a way that this element undergoes a natural general structure plastic deformation according to a mode of deformation prescribed by said predetermined shape of said first portion, and in that said element comprises a second portion arranged so as to oppose the general structural plastic deformation of the element and to undergo a natural plastic bending deformation by buckling from a predetermined value of the longitudinal compressive force applied between said ends of said element.
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30. An aircraft seat which comprises a mounting formed from a structure, the structure associated in an anchored manner with the fixed structure of the craft by means of at least one front anchorage of a front foot and by means of at least one rear anchorage of a rear foot, the front and rear feet being associated with a framework of the seat, in a normal position the front foot extending at least substantially vertically from the lower front anchorage thereof, especially perpendicularly to the floor of the craft, the front and rear feet being articulated at the respective upper ends thereof on the framework of the seat, so as to be capable of pivoting about horizontal and transverse pivot axes, the structure comprising an energy-absorbing device connected to an upper part of the rear foot, but at a distance from an upper rear articulation, and connected to the lower front anchorage in the vicinity or at the lower front anchorage, wherein the energy-absorbing device undergoes at least one longitudinal compressive force, when the structure is deformed in the event of a shock, wherein the device comprises a substantially elongate one-piece element, in that said element comprises a first portion which shape is predetermined in such a way that this element undergoes a natural general structure plastic deformation according to a mode of deformation prescribed by said predetermined shape of said first portion, and in that said element comprises a second portion arranged so as to oppose the general structural plastic deformation of the element and to undergo a natural plastic bending deformation by buckling from a predetermined value of the longitudinal compressive force applied between said ends of said element.
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31. An energy absorbing device for installation between front and rear legs of an aircraft seat, comprising:
an elongate strut having a general curvature between opposite ends forming a concave side and a convex side, and having an aperture formed through a central region thereof. - View Dependent Claims (32, 33, 34, 35, 36)
Specification