ELEMENT FOR CONNECTING A LATTICE SYSTEM

• US 20100329773A1
• Filed: 07/16/2008
• Published: 12/30/2010
• Est. Priority Date: 08/29/2007
• Status: Active Grant

• Current Assignee: Tadano Demag GmbH (Tadano Limited)
• Original Assignee: Terex Demag GmbH (Tadano Limited)
• Inventors: Martin, Michael
• Granted Patent: US 8,414,214 B2
• Time in Patent Office: Days
• US Class Current: 403/3
• CPC Class Codes: B66C 23/702 with a jib extension boom
• CPC Class Codes: Y10T 403/32271 Movable brace between members

Abstract

An element is provided for connecting the chords of a lattice system, which consists of upper chords and lower chords, between which struts and/or stays are arranged, to a telescopic boom head. Thereby, the lower chords are directly connected to the telescopic boom head by means of bolts, while the upper chords can be connected to the telescopic boom head by a connecting element of variable length in such a way that—with respect to the connection of the lower chords—the upper chords can be connected to one another at a variable angle, and wherein the connecting element consists of two butt straps which can each be fastened at one end of mutually facing ends of the upper chords and can be connected to one another at different points.

Claims

1. Element for connecting the chords of a lattice system, which consists of upper chords (3,4) and lower chords (5,6), between which struts and/or stays (8) are arranged, to a telescopic boom head, the lower chords (5,6) being directly connected to the telescopic boom head by means of bolts (7), while the upper chords (3,4) can be connected to the telescopic boom head by a connecting element of variable length in such a way that—

with respect to the connection of the lower chords—

the upper chords can be connected to one another at a variable angle, and wherein the connecting element consists of two butt straps (1,2) which can each be fastened at one end of mutually facing ends of the upper chords and can be connected to one another at different points.

2. Element according to claim 1,

characterised in that

the connecting element consists of two butt straps (1,2), which are configured the same but are arranged in a mirror-inverted manner with respect to one another.

3. Element according to any one of the preceding claims,

characterised in that

each butt strap (1,2) is configured as a two-armed lever, the arms enclosing an angle of <

90° and

a bore being provided in the region where the arms meet to fasten the butt strap at the end of the upper chord.

4. Element according to any one of the preceding claims,

characterised in that

one arm has a multiple of the length of the other arm and in that one bore is provided on the shorter arm and an approximately central bore and one arranged at the end are provided on the longer arm, to connect the butt straps (1,2) with one another.

5. Element according to any one of the preceding claims,

characterised in that

the butt straps (1,2) have different lengths.