US 11,933,327 B2
Hydraulic actuator with no friction and zero leakage, and its drive system
Kai Guo, Jinan (CN); Wei He, Jinan (CN); Jie Sun, Jinan (CN); and Mingjian Sun, Jinan (CN)
Assigned to Shandong University, Jinan (CN)
Filed by Shandong University, Jinan (CN)
Filed on Jun. 7, 2023, as Appl. No. 18/206,625.
Claims priority of application No. 202210978523.8 (CN), filed on Aug. 16, 2022.
Prior Publication US 2024/0060516 A1, Feb. 22, 2024
Int. Cl. F15B 11/08 (2006.01); F15B 13/02 (2006.01)
CPC F15B 11/08 (2013.01) [F15B 13/024 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A hydraulic actuator with no friction and zero leakage, comprising a first thickened disc structure and a second thickened disc structure; a second end face of the first thickened disc structure is connected to a first end face of the second thickened disc structure, and a control cavity is formed between the second end face of the first thickened disc structure and the first end face of the second thickened disc structure, a drive oil access hole is set on the second thickened disc structure, and the control cavity is connected with the drive oil access hole;
a convex platform is set on a first end face of the first thickened disc structure, and an installation flange is set on a second end face of the second thickened disc structure.