OPERATOR'S SEAT OF BUILDING MACHINE Russian patent published in 2003 - IPC

FIELD: construction engineering. SUBSTANCE: invention can be used in cabins of earth-moving machines and load-lifting cranes and in transportation and agricultural machines. According to invention, vertical guide frames are made wavy convex in upper part and concave in lower part forming profile resembling backbone, and curvilinear support member is installed for displacement in upper part of backrest in shoulder girdle. Two component parts of support member are made of rigid material being convex in direction of outer side of seat backrest, are hinge connected to each other and are rigidly secured by means of group of spring on upper and middle horizontal guides of frame. Adjustable seat belts are rigidly secured on shoulder and side ends of upper and lower support members. Tubular vertical posts are rigidly secured on upper horizontal guide of frame. Said post accommodate rods installed for displacement. Curvilinear support element adjustable in height is rigidly connected with arc-shaped headrest installed for turning in sagittal plane. EFFECT: improved comfort and safety of building machine operator owing to enlarged design peculiarities of seat backrest and provision of additional safety devices. 3 dwg