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. 03, 2020
Filed:
Sep. 17, 2019
China University of Mining and Technology, Xuzhou, CN;
China Mining & Civil New Material Science and Technology Ltd., Yangzhou, CN;
Jianbiao Bai, Xuzhou, CN;
Rui Wang, Xuzhou, CN;
Shuai Yan, Xuzhou, CN;
Junwu Xia, Xuzhou, CN;
Xiangyu Wang, Xuzhou, CN;
Ying Xu, Xuzhou, CN;
Gongyuan Wang, Xuzhou, CN;
Ningkang Meng, Xuzhou, CN;
Zaizhuang Fan, Xuzhou, CN;
CHINA UNIVERSITY OF MINING AND TECHNOLOGY, Xuzhou, CN;
CHINA MINING & CIVIL NEW MATERIAL SCIENCE AND TECHNOLOGY LTD., Yangzhou, CN;
Abstract
An apparatus for protecting a roof tray when a gob-side entry retaining end support migrates is provided. The apparatus is mounted at a top end position of a hydraulic support, and includes a movable bearing mechanism, an automatic expansion/contraction connecting groove mechanism, and an active reset mechanism. The movable bearing mechanism includes two parallel belts and a plurality of rollers supporting the belts, and the rollers are mounted on and supported by a bearing mechanism. The automatic expansion/contraction connecting groove mechanism is two concave base plates fixed between the two belts, and the two concave base plates are spaced by a distance. The active reset mechanism includes two telescopic rods and reset springs sleeved on the telescopic rods, and the telescopic rod is connected to an end portion of the reset spring to form a synchronous mechanism.