Patents by Inventor Mohammad Dzulkifi B. Mohyi Hapipi

Mohammad Dzulkifi B. Mohyi Hapipi 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).

  • Electrical discharge assembly and method for repairing diffusion cooling passages
    Patent number: 8563889
    Abstract: An electrical discharge assembly for processing a workpiece having a cooling passage with first and second portions includes a first electrode having a first shape for machining the first portion of the cooling passage and a second electrode having a second shape for machining the second portion of the cooling passage. In a method for repairing cooling passages in a workpiece, a first electrode having a first shape is positioned in a cooling passage. The first electrode is electrically powered to machine a first portion of the cooling passage. A second electrode having a second shape is positioned in the cooling passage. The second electrode is electrically powered to machine a second portion of the cooling passage.
    Type: Grant
    Filed: June 9, 2010
    Date of Patent: October 22, 2013
    Assignee: Pratt & Whitney Services Pte Ltd
    Inventors: Mohammad Dzulkifi B. Mohyi Hapipi, Rachel Ng, Chee Kit Sam
  • ELECTRICAL DISCHARGE ASSEMBLY AND METHOD FOR REPAIRING DIFFUSION COOLING PASSAGES
    Publication number: 20100313405
    Abstract: An electrical discharge assembly for processing a workpiece having a cooling passage with first and second portions includes a first electrode having a first shape for machining the first portion of the cooling passage and a second electrode having a second shape for machining the second portion of the cooling passage. In a method for repairing cooling passages in a workpiece, a first electrode having a first shape is positioned in a cooling passage. The first electrode is electrically powered to machine a first portion of the cooling passage. A second electrode having a second shape is positioned in the cooling passage. The second electrode is electrically powered to machine a second portion of the cooling passage.
    Type: Application
    Filed: June 9, 2010
    Publication date: December 16, 2010
    Applicant: PRATT & WHITNEY SERVICES PTE LTD
    Inventors: Mohammad Dzulkifi B. Mohyi Hapipi, Rachel Ng, Chee Kit Sam