Patents by Inventor Ning Heng

Ning Heng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Tower lifting device for rotary blasthole drill
    Patent number: 10316540
    Abstract: Disclosed is a tower lifting device for a rotary blasthole drill, comprising a hydraulic cylinder (5), an extending oil path (7), a retracting oil path (6), a speed control oil path (14) and a proximity switch (3), wherein the extending oil path (7) is connected to a non-rod-end chamber of the hydraulic cylinder (5), and an extension control unit is provided on the extending oil path (7); the retracting oil path (6) is connected to a rod-end chamber of the hydraulic cylinder (5), and a retraction control unit is provided on the retracting oil path (6); the speed control oil path (14) is connected to the retracting oil path (6), the speed control oil path (14) is connected to a speed control valve block (15) in series and the tail end thereof is connected to an oil tank (16); the proximity switch (3) is arranged on a tower supporting frame (2) for controlling the switching on and off of the speed control valve block (15), and when the tower (4) is approximately in a horizontal state, the speed control valve bl
    Type: Grant
    Filed: July 31, 2015
    Date of Patent: June 11, 2019
    Assignee: EPIROC (NANJING) CONSTRUCTION AND MINING EQUIPMENT CO., LTD.
    Inventors: Jie Zhao, Ning Heng, Chengyun Zhu
  • TOWER LIFTING DEVICE FOR ROTARY BLASTHOLE DRILL
    Publication number: 20170260769
    Abstract: Disclosed is a tower lifting device for a rotary blasthole drill, comprising a hydraulic cylinder (5), an extending oil path (7), a retracting oil path (6), a speed control oil path (14) and a proximity switch (3), wherein the extending oil path (7) is connected to a non-rod-end chamber of the hydraulic cylinder (5), and an extension control unit is provided on the extending oil path (7); the retracting oil path (6) is connected to a rod-end chamber of the hydraulic cylinder (5), and a retraction control unit is provided on the retracting oil path (6); the speed control oil path (14) is connected to the retracting oil path (6), the speed control oil path (14) is connected to a speed control valve block (15) in series and the tail end thereof is connected to an oil tank (16); the proximity switch (3) is arranged on a tower supporting frame (2) for controlling the switching on and off of the speed control valve block (15), and when the tower (4) is approximately in a horizontal state, the speed control valve bl
    Type: Application
    Filed: July 31, 2015
    Publication date: September 14, 2017
    Applicant: ATLAS COPCO (NANJING) CONSTRUCTION AND MINING EQUI PMENT LTD.
    Inventors: Jie Zhao, Ning Heng, Chengyun Zhu