Patent ID: 11952788
Assignee: PUTZMEISTER ENGINEERING GMBH
Field: Civil engineering (Other fields)
Classification: CPC E  B | IPC E

Claim 0:
1. 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.