Seat back tilt control

摘要: The lower edge of a seat back rests on fulcrum at the rear frame and has downwardly extending arms pivoted to crankpins journaled angular positions which determine tilt back. A cylinder fixed is embraced by helical torsion spring having one end anchored serving lock back, in an infinite number positions, against rearward tilting. Manual means can selectively release from permit tilting rearwardly.