Patents by Inventor Bharat B. Dhar

Bharat B. Dhar 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).

  • Equipment useful for winning ores particularly coal in longwall mining
    Patent number: 5368369
    Abstract: The present invention relates to an improved equipment useful for winning of ores particularly coal in longwal mining, the equipment comprises hydraulic master chock shield having atleast two legs at the outer edges, the master chock shield having a cylindrical conveyor belt intake end roller rotatibly mounted on a stand fixed to the base plate of the master chock shield, the base plate of the said chock shield also being provided with a plurality of stands having free moving conveyor belt guide rollers a plurality of known hydraulic chocks having atleast four legs at its edges, being placed in front of master chock shield in a horizontal line, the master chock shield and the chocks being interlinked by atleast one hydraulic ram, the base plates of each of the chocks being provided with plurality of stands having free conveyor belt guide rollers, the end chock also being provided with two horizontally fixed multi-telescopic booms supported on free moving wheels the extreme end of the booms being fixed to a fi
    Type: Grant
    Filed: May 27, 1993
    Date of Patent: November 29, 1994
    Assignee: Council Of Scientific & Industrial Research
    Inventors: Sibnath Maity, Bharat B. Dhar