BEND OF SPORTS HALL RACE TRACK Russian patent published in 1994 - IPC

FIELD: sports halls, entertainment buildings and gyms. SUBSTANCE: bend comprises a curvilinear-surface framework with a lifting means in the form of hoisting pillars installed at vertical guard of hall on support portion of building. Each of said pillars is attached to framework and has an axial helical rod with sprocket underneath which interacts via a chain with similar sprockets of other hoisting pillars. Screwed on top of the helical rod are middle and upper sections of hoisting pillars interconnected by threaded joints with helical rod. Manual force is transmitted to each hoisting pillar for lifting and lowering the framework via handwheel of worm pair and its sprocket interacting with the same chain. EFFECT: improved design. 9 dwg