公开(公告)号：US11959469B2

公开(公告)日：2024-04-16

申请号：US17637351

申请日：2020-08-20

Applicant: Putzmeister Engineering GmbH

Inventor： Carl Wiesenack ,  Benjamin Hoelzle ,  Michael Schaefer ,  Wolf-Michael Petzold ,  Jan-Martin Veit ,  Wilhelm F. Hofmann

IPC: F04B15/02 ,  F04B9/113 ,  F04B49/06 ,  F04B49/10 ,  F04B51/00

CPC classification number: F04B15/02 ,  F04B9/113 ,  F04B51/00 ,  F04B49/065 ,  F04B49/103 ,  F04B2201/0202

Abstract: A method monitors the state of a device having a first drive cylinder for receiving hydraulic fluid and a first drive piston which is movably arranged in the first drive cylinder. The method determines a speed of the first drive piston, establishes a difference between the determined speed of the first drive piston and an expected speed of the first drive piston, and determines a faulty state as a function of the difference established between the determined speed of the first drive piston and the expected speed of the first drive piston.