US 11,952,788 B2 · Angled boom comprising variable cross-section for mobile concrete pumps

Abstract

The invention relates to a boom arm for mobile concrete pumps and to a mobile concrete pump. The boom arm, having a first and second end, wherein at least one elbowed section, in which the main bending loads which occur during proper use act as torsional loads, is provided between the first and the second end of the boom arm, is made from a fiber composite material, wherein beyond the elbowed region the height of the boom arm in cross-section is greater than the width of the boom arm in cross-section and in the elbowed region the width of the boom arm in cross-section is greater than or equal to the height of the boom arm in cross-section. A concrete pump with a placing boom, arranged on a substructure, comprising at least two boom arms, at least one of which is designed according to the invention.

Claims19

Dependent claims

A boom arm (5) for a placing boom (2) for a concrete pump (1):

said boom arm (5) made from a fiber composite material, said boom arm (5) having a first end (10) and a second end (11) and an elbowed section (12) between the first and second ends (10, 11), said elbowed section (12) is angled relative to an axis of the boom arm (5) between the elbowed section (12) and the second end (11) of the boom arm (5),
wherein said boom arm has a first cross-section in the elbowed section (12), said first cross-section having a width (b) greater than or equal to a height (h), and a second cross-section outside of the elbowed section (12) having a height (h) greater than a width (b), the first and second cross sections are based on an octagon having p4 symmetry and at least some of the sides of the boom arm are curved convexly outward.

Dependencies are inferred from the claim text.

Angled boom comprising variable cross-section for mobile concrete pumps

Life of this patent

Angled boom comprising variable cross-section for mobile concrete pumps

Life of this patent

Abstract

Claims19