公开(公告)号：US20220128069A1

公开(公告)日：2022-04-28

申请号：US17427353

申请日：2020-01-29

Applicant: Putzmeister Engineering GmbH

Inventor： Martin DIEBOLD ,  Jan-Martin VEIT

IPC: F15B13/02 ,  E04G21/04 ,  B60S9/10

Abstract: A vehicle having a thick matter pump has multiple supporting devices, a rotatable mast assembly with part-mast members, and a hydraulic drive assembly with hydraulic drives for the supporting devices and the mast assembly. A valve assembly is provided for the hydraulic drive assembly. The valve assembly has a group of proportional valves and a group of switching valve devices which are each connected to at least one hydraulic drive of the supporting devices or the part-mast members. The switching valve devices are connected downstream of the proportional valves. Exactly one switching valve device is supplied by exactly one proportional valve and is connected downstream of exactly one proportional valve such that outputs of the proportional valves lead exclusively to inputs of the switching valve devices.