Patents by Inventor Trung K. Pham

Trung K. Pham 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).

  • Constant flow rate control valve with low pressure drop start
    Patent number: 5265643
    Abstract: A constant flow rate control valve (10) is provided including a cup member (12) disposed in a flow passage through the valve (10). The cup member has an orifice (18) located in an end wall (14) of the cup member (12) and a plurality of side ports (22) in a side wall (16) of the cup member (12) The cup member (12) is moveable axially within the-valve (10), with such movement being opposed by a resilient spring member (30) downstream of the cup member (12). The valve (10) includes a fixed retainer ring (26) in a valve body (24) surrounding the side wall (16) of the cup member (12) which blocks or exposes areas of the side ports (22) in response to movement of the cup member (12). Start up slots (34) in a side wall (36) of the valve body (24) are also blocked or exposed in response to movement of the cup member (12).
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: November 30, 1993
    Assignee: Flow Design Inc.
    Inventors: Farhad Golestan, Trung K. Pham, David I. Sexton, Jr.
  • Constant flow rate control valve with low pressure drop start
    Patent number: 5174330
    Abstract: A constant flow rate control valve (10) is provided including a cup member (12) disposed in a flow passage through the valve (10). The cup member has an orifice (18) located in an end wall (14) of the cup member (12) and a plurality of side ports (22) in a side wall (16) of the cup member (12). The cup member (12) is moveable axially within the valve (10), with such movement being opposed by a resilient spring member (30) downstream of the cup member (12). The valve (10) includes a fixed retainer ring (26) in a valve body (24) surrounding the side wall (16) of the cup member (12) which blocks or exposes areas of the side ports (22) in response to movement of the cup member (12). Start up slots (34) in a side wall (36) of the valve body (24) are also blocked or exposed in response to movement of the cup member (12).
    Type: Grant
    Filed: December 5, 1991
    Date of Patent: December 29, 1992
    Assignee: Flow Design, Inc.
    Inventors: Farhad Golestan, Trung K. Pham, David I. Sexton, Jr.