Patents by Inventor Congxiao Calvin Wang

Congxiao Calvin Wang 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).

  • Pump and pump control circuit apparatus and method
    Patent number: 6623245
    Abstract: A method and apparatus for a pump and a pump control system. The apparatus includes pistons integrally formed in a diaphragm and coupled to the diaphragm by convolutes. The convolutes have a bottom surface angled with respect to a top surface of the pistons. The apparatus also includes an outlet port positioned tangentially with respect to the perimeter of an outlet chamber. The apparatus further includes a non-mechanical pressure sensor coupled to a pump control system. For the method of the invention, the microcontroller provides a pulse-width modulation control signal to an output power stage in order to selectively control the power provided to the pump. The control signal is based on the pressure within the pump, the current being provided to the pump, and the voltage level of the battery.
    Type: Grant
    Filed: November 26, 2001
    Date of Patent: September 23, 2003
    Assignee: SHURflo Pump Manufacturing Company, Inc.
    Inventors: Humberto V. Meza, Congxiao Calvin Wang
  • Pump and pump control circuit apparatus and method
    Publication number: 20030099548
    Abstract: A method and apparatus for a pump and a pump control system. The apparatus includes pistons integrally formed in a diaphragm and coupled to the diaphragm by convolutes. The convolutes have a bottom surface angled with respect to a top surface of the pistons. The apparatus also includes an outlet port positioned tangentially with respect to the perimeter of an outlet chamber. The apparatus further includes a non-mechanical pressure sensor coupled to a pump control system. For the method of the invention, the microcontroller provides a pulse-width modulation control signal to an output power stage in order to selectively control the power provided to the pump. The control signal is based on the pressure within the pump, the current being provided to the pump, and the voltage level of the battery.
    Type: Application
    Filed: November 26, 2001
    Publication date: May 29, 2003
    Inventors: Humberto V. Meza, Congxiao Calvin Wang