A frame beam member may include a tubular volume. The tubular volume may include at least one wall with one or more undulations in a radial direction along a length of the tubular volume. The one or more undulations may be configured to allow the tubular volume to absorb energy of a load applied during a flight scenario through local bending of the one or more undulations. The one or more undulations may be configured to have a first curvature when unloaded, and may be configured to have a second curvature when the load is applied. The second curvature may be different than the first curvature. The frame beam member may be one of a plurality of frame beam members of the aircraft seat frame. The plurality of frame beam members may be configured to couple to a plurality of joints of the aircraft seat frame.

A seat pan for a passenger seat and a passenger seat. The seat pan is corrugated for partially absorbing a downward loading applied to the seat pan through deformation of a corrugation pattern of the seat pan as a result of a counter force applied by a support structure of the passenger seat.

The transport vehicle seat allows to avoid the violent collision of a passenger's head located on the seat placed behind and to dampen the violent forward rocking of this passenger, in case of a frontal collision of the transport vehicle. The seat includes a pivotably mounted fold-down element (10), such as a table, placed on the rear face of a seat back. It has blocking part (14) holding the fold-down element (10) in a substantially vertical position, blocking part (14) being able to break off during a collision applied to the fold-down element (10) and to allow the latter to go on rocking towards the back seat to which it is attached. Application to aircraft seats.

A vehicle seat for a passenger, comprising a backrest having a front face directed towards the passenger and a rear face opposite the front face, and a seat part having an upper face directed towards the passenger and a lower face opposite the upper face, wherein the rear face of the backrest and/or the lower face of the seat part comprise(s) at least one area that is deformable in the event of an impact, towards the front face of the backrest and/or towards the upper face of the seat part respectively, and in that the front face and rear face of the backrest, and/or the upper face and lower face of the seat part are located at a distance from each other, at least at said at least one deformable area, so as to define a clearance space, said at least one deformable area of the rear face of the backrest and/or of the lower face of the seat part being configured so as to deform into the clearance space in the event of an impact on the rear face of the backrest and/or the lower face of the seat part, without transmitting the impact to the front face of the backrest and/or the upper face of the seat part respectively.

A vehicle seat comprising a stand and a bucket having a seat pan and a seat back. Said stand serves to fasten said bucket to a floor of said vehicle and to absorb deformation of said floor while limiting the mechanical stresses that are transmitted to said bucket. Said pan is connected to said bucket via a revolute joint for pivoting about a transverse direction and by energy absorber devices. The stand has two first legs forming a fork and connecting the front of said bucket to said floor via ball joint connections. The bucket is connected to said floor at the rear of the seat via two ball joint connections. The stand is thus connected to said bucket via three points and to said floor via four points making it possible to avoid twisting said bucket as a result of deformation of said floor.

A completely integrated metallic seat pan with a negative stiffness includes a seat pan base, an internal metallic lattice, and a metallic seat pan cover surrounding the metallic lattice. The metallic lattice and seat pan cover elastically deform to absorb the weight of the crewmember and provide cushioning. The seat pan cover is contoured. Portions of the contoured seat pan cover may have greater or lesser cross-sectional thickness to provide variable negative stiffness at different locations on the seat pan.

A rotary recline mechanism for allowing reclining movement of a first part relative to a second part, the mechanism comprising: a first gear mechanism comprising first and second gear rings having first and second sets of teeth that engage to lock the first and second parts relative to each other and disengage on operation of an actuator to allow relative movement of the first and second parts by application of a force on one of the parts in a first direction, and a second override gear mechanism to allow relative movement of the first and second parts by application of a force in a second direction while the first and second sets of teeth are engaged.

A passenger includes at least one seat component including a first material and at least one additive manufactured component including a second material, the at least one additive manufactured component including a plurality of zones. The at least one additive manufactured component is attached to the at least one seat component. The at least one additive manufactured component includes a lattice structure. Each of the plurality of zones have different physical properties.

The invention mainly relates to a system for the inertial unlocking of a seat back, in particular of an aircraft seat, characterized in that it comprises: a structural element of the seat back, called a connecting rod, a support piece for the fixation to a structural element of said seat, the support piece comprising a flyweight movable in translation between: a locking position in which the flyweight faces a lip of the connecting rod so as to prevent the connecting rod from rotating relative to the support piece about the axis of rotation, and an unlocking position in which the flyweight is released from the lip of the connecting rod so as to allow the connecting rod to rotate relative to the support piece about the axis of rotation, the passage of the flyweight from the locking position to the unlocking position being able to be carried out under the action of a deceleration by the seat.

A system and method for delivering an axial compression load to a passenger during a frontal deceleration event is disclosed. The system includes a seat frame, a seat pan, and an impulse generator coupled to the seat pan configured to provide an axial compression load onto a spine of a sitting passenger during a forward deceleration event. The system further includes a controller configured to receive a forward deceleration signal from the inertial sensor and activate the impulse generator based on the forward deceleration signal. The impulse generator may generate a compressive force via a chemical reaction, via a mechanically stored energy, a solenoid switch, or via a rotating cam assembly.