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:
Aug. 10, 2021
Filed:
Apr. 23, 2020
Welead Infrastructure Engineering Technology (Zhengzhou), Ltd., Henan, CN;
Safekey Engineering Technology (Zhengzhou), Ltd., Henan, CN;
Fuming Wang, Henan, CN;
Hongyuan Fang, Henan, CN;
Peng Zhao, Henan, CN;
Chengchao Guo, Henan, CN;
Yanhui Pan, Henan, CN;
Xianfeng Zhao, Henan, CN;
Guobin Qiao, Henan, CN;
Zhihui Jia, Henan, CN;
Hui Liu, Henan, CN;
Abstract
A pressing-pulling device includes: a pressing-pulling bracket, wherein slotting oil cylinders are symmetrically and vertically mounted on the pressing-pulling bracket, and a piston rod of each of the slotting oil cylinders faces downwardly; a bottom end of the piston rod is connected to a connecting plate, and a through-hole is provided in a middle of the connecting plate; a continuous lifting mechanism is installed in a middle of the pressing-pulling bracket, and a slotting rod is vertically inserted into the continuous lifting mechanism; a lifting ring is installed at a top end of the slotting rod; a bottom end of the slotting rod extends downwardly through the through-hole to connect to a slotting cutter; a locking device is fixed on the connecting plate near the through-hole for fixing the slotting rod.