DOUBLE-MOTOR FAN Russian patent published in 2000 - IPC

FIELD: fan manufacture; temperature control systems. SUBSTANCE: fan has housing accommodating coaxially arranged main and stand-by motors, and propeller; motors are facing each other with their shaft extensions and propeller is mounted in bearings placed between butt ends of motors; centrifugal couplings are mounted between motors; one of their driving half-couplings is mounted on main- motor shaft and other half-coupling, on stand-by motor shaft; both driven half-couplings are fixed in position relative to propeller. EFFECT: simplified design, enlarged functional capabilities. 2 cl, 2 dwg