Adjustable seat with seat belt

Claim 1

IN A SEAT, THE COMBINATION COMPRISING A SEAT FRAME INCLUDING A FRONT STRUCTURAL RAIL, STRUCTURAL SIDE RAILS, AND A STRUCTURAL REAR RAIL, MEANS FOR FASTENING THE FRONT END OF SAID SIDE RAILS TO THE FRONT RAIL, EACH SAID SIDE RAIL INCLUDING A FIRST TUBULAR PORTION ADJACENT THE FORWARD END THEREOF AND A SECOND TUBULAR PORTION ADJACENT THE REAR END THEREOF; SAID SECOND PORTION FLARING OUTWARDLY REARWARDLY INTO A SUBSTANTIALLY U-SHAPED CROSS SECTION INCLUDING A TOP WALL AND SIDE WALLS, SAID REAR RAIL BEING WELDED TO SAID FLARED PORTION OF SAID SIDE RAILS, A PIN EXTENDING TRANSVERSELY BETWEEN THE SIDE WALLS OF THE REAR PORTION OF EACH SAID SIDE RAIL FOR ATTACHMENT OF A SEAT BELT, A SUPPORT ADAPTED TO BE FASTENED TO THE FLOOR OF A VEHICLE AND INCLUDING A TUBULAR UPPER PORTION TELESCOPED WITHIN THE SIDE RAIL AND A WEB EXTENDING DOWNWARDLY FROM SAID TUBULAR PORTION BETWEEN THE FLANGES OF SAID SIDE RAIL, BEARING MEANS POSITIONED AT LONGITUDINLLY SPACED POINTS WITHIN SAID SIDE RAIL BETWEEN THE SIDE RAIL AND SAID TUBULAR PORTION OF SAID SUPPORT, AND MEANS EXTENDING BETWEEN EACH SAID SIDE RAIL AND ITS RESPECTIVE SUPPORT FOR LOCKING SAID SIDE RAILS IN ADJUSTED POSITION.