US 11,913,479 B2
Impact-resistant balanced hydro-cylinder with pressure relief and buffering protection
Lirong Wan, Shandong (CN); Xuehui Yu, Shandong (CN); Dejian Ma, Shandong (CN); Jiantao Wang, Shandong (CN); Fengwen Xin, Shandong (CN); Zhaoji Li, Shandong (CN); Guoqing Qi, Shandong (CN); and Baolong Chen, Shandong (CN)
Assigned to SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shandong (CN)
Appl. No. 17/781,439
Filed by SHANDONG UNIVERSITY OF SCIENCE AND TECHNOLOGY, Shandong (CN)
PCT Filed Apr. 30, 2021, PCT No. PCT/CN2021/091362
§ 371(c)(1), (2) Date Jun. 1, 2022,
PCT Pub. No. WO2022/016949, PCT Pub. Date Jan. 27, 2022.
Claims priority of application No. 202011425245.0 (CN), filed on Dec. 9, 2020.
Prior Publication US 2022/0412380 A1, Dec. 29, 2022
Int. Cl. F15B 15/20 (2006.01); F15B 15/22 (2006.01); F15B 15/17 (2006.01)
CPC F15B 15/17 (2013.01) [F15B 15/20 (2013.01); F15B 15/204 (2013.01); F15B 15/22 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An impact-resistant balanced hydro-cylinder with pressure relief and buffering protection, comprising 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), wherein a closed first gas cavity (22) is formed between the first valve core (21) and an inner wall of an end of the cylinder body (11) and a closed second gas cavity (52) is formed between the second valve core (51) and an inner wall of an opposite end of the cylinder body (11), a closed first oil cavity (32) is formed between the first valve core (21) and an end face of the piston (13) and a closed second oil cavity (42) is formed between the second valve core (51) and another end face of the piston (13), and a through hole (33) for the first oil cavity is provided at a position on the cylinder body (11) corresponding to the first oil cavity (32) and a through hole (43) for the second oil cavity is provided at a position on the cylinder body (11) corresponding to the second oil cavity (42); and
wherein a one-way valve (25) for the first gas cavity and a one-way valve (55) for the second gas cavity are mounted on the cylinder body (11) and communicate with the first gas cavity (22) and the second gas cavity (52) respectively.