公开(公告)号：US11913479B2

公开(公告)日：2024-02-27

申请号：US17781439

申请日：2021-04-30

Applicant: SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY

Inventor： Lirong Wan ,  Xuehui Yu ,  Dejian Ma ,  Jiantao Wang ,  Fengwen Xin ,  Zhaoji Li ,  Guoqing Qi ,  Baolong Chen

IPC: F15B15/20 ,  F15B15/22 ,  F15B15/17

CPC classification number: F15B15/17 ,  F15B15/20 ,  F15B15/204 ,  F15B15/22

Abstract: An impact-resistant balanced hydro-cylinder with pressure relief and buffering protection comprises a cylinder body (11), a piston (13), a piston rod (14), and a first valve core (21) and a second valve core (51) slidable relative to the cylinder body (11). A closed first gas cavity (22) and a closed second gas cavity (52) are respectively formed between the two valve cores and inner walls of two opposite ends of the cylinder body (11). A closed first oil cavity (32) and a closed second oil cavity (42) are respectively formed between the two valve cores and two end faces of the piston (13). A through hole (33) for the first oil cavity and a through hole (43) for the second oil cavity are respectively provided in the positions on the cylinder body (11) corresponding to the first oil cavity (32) and the second oil cavity (42).