Patent ID: 9452913
Filing Date: 2016-09-27
CPC Classification: B66C,B66F

Claim Text:
1. A telescopic boom extending along a longitudinal axis, comprising: a base section configured for connection to a frame of a machine for lifting loads; a plurality of movable sections; a hydraulic cylinder connecting the base section to a first movable section of the plurality of movable sections for extending the first movable section relative to the base section; at least one extension chain between the base section and a second movable section of the plurality of movable sections for extending the second movable section relative to the first movable section, the at least one extension chain positioned near an outer portion of the first movable section when the telescopic boom is in an extended configuration; at least one retraction chain positioned near an inner portion of one of the plurality of movable sections when the telescopic boom is in the extended configuration; and at least another extension chain interposed between the first movable section and a third movable section of the plurality of movable sections for extending the third movable section relative to the second movable section, the at least another extension chain positioned near an outer portion of the second movable section when the telescopic boom is in the extended configuration, wherein when the telescopic boom is in the extended configuration, the at least one extension chain and the at least one retraction chain are positioned near each other and separated by a portion of one movable section, the at least one extension chain and the at least one retraction chain each located at a same side of the longitudinal axis.