Patents by Inventor Daniel G. Opoku

Daniel G. Opoku 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).

  • System and method for reducing belt noise
    Patent number: 10336581
    Abstract: The present invention is directed to an elevator system. The elevator system comprises a car, a counterweight, at least one belt connecting the car and counterweight, and at least one sheave having a surface that engages with the belt. At least part of the surface of the sheave that interfaces with the belt has a plurality of features for reducing unwanted noise created due to the interaction between the belt and the sheave surface.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: July 2, 2019
    Assignee: OTIS ELEVATOR COMPANY
    Inventors: David R. Polak, Christopher T. Chipman, Charles C Coffin, Arthur Blanc, John P. Wesson, Yan Chen, Daniel G. Opoku, Sergei F. Burlatsky
  • System And Method For Reducing Belt Noise
    Publication number: 20130292211
    Abstract: The present invention is directed to an elevator system. The elevator system comprises a car, a counterweight, at least one belt connecting the car and counterweight, and at least one sheave having a surface that engages with the belt. At least part of the surface of the sheave that interfaces with the belt has a plurality of features for reducing unwanted noise created due to the interaction between the belt and the sheave surface.
    Type: Application
    Filed: January 21, 2011
    Publication date: November 7, 2013
    Inventors: David R. Polak, Christopher T. Chipman, Charles C. Coffin, Arthur Blanc, John P. Wesson, Yan Chen, Daniel G. Opoku, Sergei F. Burlatsky
  • Elevator ceiling ventilation cavity
    Patent number: 8500525
    Abstract: An elevator cab ceiling includes an upper ceiling panel and a lower ceiling panel that are vertically spaced apart from each other with an intermediate ceiling cavity between them. An inlet duct is associated with the upper ceiling panel and an outlet duct is associated with the lower ceiling panel. The inlet and outlet ducts are horizontally spaced apart from each other and are fluidly connected to each other through the intermediate ceiling cavity to form a ventilation path. This separation of inlet and outlet ducts by an intermediate ceiling cavity reduces airborne noise transmissions that enter an elevator cab through the ventilation path. In one example, at least one baffle is installed within the intermediate ceiling cavity between the inlet and outlet ducts to interrupt a flow between the inlet and outlet to further reduce any transmitted noise.
    Type: Grant
    Filed: February 3, 2005
    Date of Patent: August 6, 2013
    Assignee: Otis Elevator Company
    Inventors: Daniel G. Opoku, Murllo W. Bonilha, Wenlong Li, Goldino Alves, Vijay Jayachandran