Patents by Inventor Colin J. MacDonald, Jr.

Colin J. MacDonald, Jr. 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).

  • Tempered water mixing system
    Patent number: 6119947
    Abstract: An improved tempered water mixing system comprises a thermostatically operated main mixing valve for blending cold and hot water supplies during normal system operation, a secondary temperature-limiting flow-control device in the form of a thermostatic valve (also known as a pressure-regulator), with the thermostatic valve and the pressure regulating valve being connected to function as fail-safe devices so as to provide an uninterrupted discharge outflow at a substantial flow rate in the event of a malfunction of the main mixing valve.
    Type: Grant
    Filed: January 5, 1999
    Date of Patent: September 19, 2000
    Assignee: Symmons industries, Inc.
    Inventors: John R. Couture, Colin J. MacDonald, Jr.