초록 ▼

The device and method for arresting movement of sections in a telescopic jib, which includes at least a first section and a second section and a telescopic cylinder telescoping the second section along a longitudinal axis of the telescopic jib relative to the first section, telescopes the second sec

The device and method for arresting movement of sections in a telescopic jib, which includes at least a first section and a second section and a telescopic cylinder telescoping the second section along a longitudinal axis of the telescopic jib relative to the first section, telescopes the second section using the telescopic cylinder to a desired working position. Then, movement of the second section is arrested using at least one sliding element connected and moveable with respect to the second section. The sliding element is disposed between the first and second sections, and arrests movement of the second section with respect to the first section when in an arresting position.

대표청구항 ▼

[ What is claimed is:] [1.] A crane comprising:a telescopic jib having at least a first section and a second section;means for telescoping said second section along a longitudinal axis of said telescopic jib relative to said first section;a substantially smooth first surface formed on said first sec

[ What is claimed is:] [1.] A crane comprising:a telescopic jib having at least a first section and a second section;means for telescoping said second section along a longitudinal axis of said telescopic jib relative to said first section;a substantially smooth first surface formed on said first section;a substantially smooth second surface formed on said second section, said second surface having an inclination relative to said first surface, such that said second surface and said first surface are nonparallel; anda sliding element residing between said first surface and said second surface, said sliding element being movable between a first position on said second surface wherein said sliding element engages both said second surface and said first surface to arrest telescoping movement of said second section relative to said first section, and a second position along said second surface wherein said sliding element engages only one of said first and second surfaces and allows said second section to telescope relative to said first section.