The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 24, 2020
Filed:
Mar. 12, 2019
China University of Mining and Technology, Jiangsu, CN;
Yanlong Chen, Jiangsu, CN;
Hai Pu, Jiangsu, CN;
Feng Ju, Jiangsu, CN;
Kai Zhang, Jiangsu, CN;
Yu Wu, Jiangsu, CN;
Ming Li, Jiangsu, CN;
Jiangfeng Liu, Jiangsu, CN;
Peng Wu, Jiangsu, CN;
Jincheng Fan, Jiangsu, CN;
Zhiwei Feng, Jiangsu, CN;
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, Jiangsu, CN;
Abstract
A mechanical constant-resistance single prop continuous prop lifting pre-tightening device, structurally composed of a continuous prop lifting device, a pressurizing system, an oil supply line and a monitoring unit. The continuous prop lifting device is a core component, comprising a hydraulic cylinder, a prop barrel clamping sleeve ring and a prop rod clamping sleeve ring. The prop rod clamping sleeve ring is fixedly connected with a piston rod of the hydraulic cylinder by means of a cylinder head seat, and the prop barrel clamping sleeve ring is fixedly connected with a cylinder body of the hydraulic cylinder. With continuous pressurization of the pressurizing system, a cohesion occurs between the continuous prop lifting device and a prop rod, so that the prop rod of a single prop is lifted up to come into contact with a top plate and provide a pre-tightening force.