Abstract: In a passenger seat arrangement a passenger seat with backrest is arranged movably on a support structure including two side support bases and a mounting beam structure extending across the support bases and having spaced box frame members including T-shaped grooves, the seat is mounted on bearing structures disposed in the grooves of the box frame members thereby providing for the movability of the seat relative to an adjacent seat mounted on the same support structure for adjustability of the seat spacing without obstruction of the leg room underneath the seats.

Abstract: In a double passenger seat support arrangement for use in land, water or air transports which comprises a seat support frame with spaced support legs interconnected by a support beam structure having spaced sets of box spar and mounting track structures, each such set has at least two mounting track structures arranged side-by-side and firmly connected to, or integral with, the associated box spar structure with one of the mounting track structures defining a downwardly open channel for mounting the support beam structure onto the legs and the other having an upwardly open channel for mounting the seats onto the support beam structure.

Abstract: In a passenger seat for people movers such as trains, buses, ships and airplanes wherein a backrest with a circumferential frame extends upwardly from the seat's seating structure and has a back support mounted thereon, the back support has an opening formed therein just above the seating structure at about knee level for a passenger seated behind and a band structure adapted to yield to a predetermined limit when subjected to a knee impact by a passenger thrown forward onto the backrest ahead extends between the side members of the frame so as to permit forward movement of the knees into the opening in the backrest.

Abstract: In a seat support arrangement for passenger vehicles wherein a number of seats with backrests are mounted on a seat support structure including a transverse frame supported by legs and consisting of two spaced struts and for each seat a support frame mounted on the struts, the struts are flat tubular profile spars having two partial box spar sections and two C-shaped track sections arranged in opposite corner areas and in such a manner that the C-shaped track sections are open in opposite directions and each slidably receives slot bolts for engagement with the seat legs beneath and, respectively, the support frames above.

Abstract: A passenger seat constructed of rectangular tube sections, which is stiffened by a beam disposed at the intersection of the seat backs with the seat, which beam consists of a rear frame piece connected to the rear frame structure and having upwardly pointing joint supports, which in turn are firmly located by stiffening rods. The lower ends of the seat back side frame members are reinforced by stiffening members mounted to their front side and at the same time forming lugs for pivotally supporting the seat backs on the joint supports, so as to provide for lowest possible weight together with the necessary strength.

Abstract: A passenger seat with seating and backrest sections has an armrest pivotally supported on armrest support means by a bearing including an elastomeric ring structure disposed in wedge-shaped grooves formed opposite one another in the joint of the armrest and the armrest support means. The armrest and armrest support means are held in engagement by a bolt extending through a relatively large opening in one and screwed into the other of the armrest and the armrest support means and the elastomeric ring structure is axially wedged into the grooves to provide firm radial bearing support which prevents contact between the bolt and the walls of the opening so as to prevent rattling.