| 摘要 |
<p>A telescoping boom crane having a multi-sectioned, telescopically extending boom (20) and an extensible pendant support system (60). The extending boom includes boom sections (14, 16) that are extensibly receivable within the adjacent boom section (12, 14). The boom sections are made of a sheet material. A releasable locking mechanism (18) may be attached to the boom sections to secure the boom sections. The extensible pendant support system includes a plurality of pendants (62, 64, 66). The pendants are extensibly receivable within an adjacent pendant. The pendant support system at least partially supports the boom when a load is applied to the boom. Further, the support system may include a forestay length locking device (10) functioning to prohibit extension of a subsequent pendant from an adjacent pendant once the former pendant achieves an extended position.</p> |
