This patent protects an on-machine device that adjusts the flatness of freshly placed concrete during paving. It is applied to dam slope pavers, canal lining machines and other concrete finishing equipment where surface evenness directly affects lining quality and water-tightness. The device lets operators compensate for substrate irregularities without stopping the paving run.
Patent publication: CN 209854664 U. Application filed 22 April 2019; granted 27 December 2019. Inventors: Yang Liqun, Lian Haijiao, Gao Chao, Li Hui and Wang Chao.