TELESCOPIC BOOM Russian patent published in 2002 - IPC

FIELD: mechanical engineering; materials handling facilities. SUBSTANCE: proposed telescopic boom has support and telescopic sections, drive working member and hydraulic lines for delivering liquid to elements of hydraulic drive installed on end. Each hydraulic line consists of rigid pipelines connected by swivel joints and flexible pipelines. Extreme pipelines and swivel joints of coupling are secured on support section and telescoping section, and intermediate rigid pipelines are interconnected by flexible pipeline placed inside coil springs. EFFECT: improved reliability of machine as a whole, provision of compact design and protection against damage of pipelines in service. 1 dwg