Abstract: An aircraft seat apparatus installed in a cabin of an aircraft includes a seat portion, a slide mechanism, bulkheads, and a seat portion driving unit. The seat portion is movable in a back-and-forth direction. The slide mechanism supports the seat portion to be movable in the back-and-forth direction. The bulkheads support the slide mechanism to form a space under the seat portion together with the seat portion, and are fixed to a cabin floor member. The seat portion driving unit is arranged under the seat portion to move it in the back-and-forth direction.

Abstract: Disclosed is a tilt lock device for a passenger seat used for a vehicle, ship or air plane, which has a seat back (1) mounting a shoulder harness (12). It includes a base frame (5) having a pair of right and left spreaders (6) composed of front side supporting portions (6a) hung substantially in the horizontal direction between front and rear beams (3)(4), and rear side supporting portions (6b) projecting so as to be tilted upward from the rear portions of the front side supporting portions (6a), wherein the lower end portions of seat back frames (2) are rotatably supported on the rear side supporting portions (6b) of the spreaders (6).

Abstract: A front leg (1) is formed by an upright support rod extending vertically above a fixing stud (8), a rear leg (2) is formed by both a lower support rod (2a) extending on a diagonal line joining the upper end of the front leg and the lower end of the rear leg and an upper support rod (2b) contiguous to the lower support rod (2a) in an upper position relative to the lower support rod, the upper support rod (2b) being curved arcuately and inclined rearwardly upwards, and an energy absorber (12) is mounted bridgewise as a diagonal member between the upper end portion of the front leg and the lower end portion of the rear leg, to constitute a leg structure. Accordingly to this leg structure, a striking energy is absorbed by an anti-plastic deformation force induced when the rear leg (2) and the energy absorber (12) is deformed plastically under an impact larger than a predetermined value, and the seat is held at its supported posture in normal use.