Patents by Inventor DO SUB JANG

DO SUB JANG 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).

  • Hydraulic double-acting hand pump
    Patent number: 10344746
    Abstract: The present invention is directed to a hydraulic double-acting hand pump in which a high and low pressure side fluid supply grooves are formed in a top surface, a fluid inlet is formed in a bottom surface, a body in which the fluid outlet is formed in a side surface is provided, a piston is inserted into and coupled to the high and low pressure side fluid supply grooves, an upper end of the piston is connected and fixed to a handle rotatably installed in the low pressure side fluid supply groove of the body, the piston alternately and repeatedly ascends and descends to supply fluids to the high and low pressure side fluid supply grooves, and the fluids are discharged through the fluid outlet of the body by pushing the fluids inside the high and low pressure side fluid supply grooves.
    Type: Grant
    Filed: May 5, 2016
    Date of Patent: July 9, 2019
    Assignee: YKMC, INC.
    Inventors: Chan Jo Jung, Kwan Seop Jang, Do Sub Jang
  • HYDRAULIC DOUBLE-ACTING HAND PUMP
    Publication number: 20160341186
    Abstract: The present invention is directed to a hydraulic double-acting hand pump in which a high and low pressure side fluid supply grooves are formed in a top surface, a fluid inlet is formed in a bottom surface, a body in which the fluid outlet is formed in a side surface is provided, a piston is inserted into and coupled to the high and low pressure side fluid supply grooves, an upper end of the piston is connected and fixed to a handle rotatably installed in the low pressure side fluid supply groove of the body, the piston alternately and repeatedly ascends and descends to supply fluids to the high and low pressure side fluid supply grooves, and the fluids are discharged through the fluid outlet of the body by pushing the fluids inside the high and low pressure side fluid supply grooves.
    Type: Application
    Filed: May 5, 2016
    Publication date: November 24, 2016
    Applicant: YKMC, INC.
    Inventors: CHAN JO JUNG, KWAN SEOP JANG, DO SUB JANG