CUSHION FOR CHAIR SEAT AND CHAIR SEAT WITH SUCH CUSHION Russian patent published in 2001 - IPC

FIELD: production of furniture. SUBSTANCE: cushion has length L1 which is substantially less than effective length Lo of seat 21 to allow rear edge 4 of cushion to be moved to position under user's hip joint, when user is in sitting position, with front edge 3 of cushion being offset inward of front edge 4 of cushion 21. Cushion has effective thickness t2 of 25-45 mm defined by flat surface of cushion and cushion upper side parts 2 upon which user's hips rest. Chair has seat 40 and back 22. Seat has cushion with front and rear parts movable in vertical plane one relative to the other between first position, when front and rear parts are lying in single plane and each part carries substantial part of user's weight, and second position, in which front part of cushion is positioned at higher level as compared to rear part and carries greater portion of user's weight. Cushion of such construction is adapted to be put onto front part of chair seat and is not compressed under user's weight. EFFECT: simplified construction, convenient usage and increased efficiency by providing adjustable position for user and, consequently, eliminating pain in user's back. 10 cl, 7 dwg