Patent ID: 9376827
Filing Date: 2016-06-28
CPC Classification: E04G,F16L,Y10T

Claim Text:
1. A method for producing a boom arm having a boom-arm body and having at least one pipe holder for a concrete-distributing boom for use on stationary and mobile concrete pumps having a plurality of boom arms which are connected to one another such that they can be pivoted about an axis of articulation at folding articulations and retain a concrete-delivery line, which has at least one rotary articulation having an axis of rotation aligned with an of articulation of folding articulation, wherein the at least one pipe holder has a pipe-carrier portion, which serves for accommodating the concrete-delivery line at a retaining location, of which a siting is predetermined by a position of the axis of articulation, wherein the boom-arm body is prefabricated with an accommodating interface and the at least one pipe holder is prefabricated with a fastening portion, which has a connection interface, wherein the accommodating interface is produced with at least three plane-defining positional reference points, which are independent of production tolerances of the boom-arm body and are predetermined by the position of the axis of articulation such that, and the connection interface having at least three plane-defining Positional reference points, which predetermine a position of the pipe-carrier portion such that, the concrete-delivery line, by virtue of the pipe holder having a connection interface connected to the accommodating interface of the boom-arm body, is accommodated by the pipe-carrier portion such that the retaining location has a siting predetermined by the position of the axis of articulation.