Energy absorbing aircraft seat frame structure

Abstract From the Canadian patent

Improved energy absorbing seat frame structure for an aircraft seat has leg structures which comprise a pair of generally U-shaped front and rear legs which are joined back to back in a generally X-shaped configuration. curved die member is held in contact with the forward facing concave portion of the front leg by a strap member which surrounds the the rear leg. In a crash situation, the front leg can bend about the die member to lower the center of gravity. In a preferred embodiment, strap type clamps on the upper ends of each leg permit the legs to rotate relative to the tubular stretcher members of the seat. The ability of the front legs to be deformed downwardly permits a portion of …