AIR HOIST Russian patent published in 1994 - IPC

FIELD: hoisting devices. SUBSTANCE: air hoist has hollow housing, tubular guide, source for pressure feed of working medium, flexible hose, drive drum, traction member and load platform with rollers. Flexible hose is positioned inside tubular guide. One end of hose is closed and connected with traction member. Other end of hose is turned inside out and secured along perimeter of tubular guide. Drive drum is disposed in inner space of housing. One end of traction member is secured on drive drum. Flexible ties are positioned on inner side surface of hose. Ends of flexible ties are rigidly connected with ends of hose. Load platform is made in the form of cylindrical sleeve. Tubular guide is positioned inside cylindrical sleeve. Rollers are located in inner space of cylindrical sleeve and are secured on its bottom. Each flexible tie embraces respective roller. EFFECT: improved efficiency. 1 dwg