Patents by Inventor Malcolm Lloyd ALFORD

Malcolm Lloyd ALFORD 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).

  • HVAC systems having improved four-way valve reheat control
    Patent number: 10234149
    Abstract: In one instance, a heating, ventilating, and air conditioning (HVAC) system includes a four-way reheat valve and is configured to accesses pressures within a conduit network to facilitate control of the reheat valve. The four-way reheat valve includes a piston valve slide within a main valve chamber and a pilot valve fluidly coupled to the main valve chamber and a compressor-suction conduit fluidly coupled to the four-way valve and to a compressor. The system also includes a flow-restricting device disposed on the conduit downstream of the four-way valve and a pilot conduit coupled to the conduit downstream of the flow-restricting device and coupled to the pilot valve for assisting with movement of the piston valve slide.
    Type: Grant
    Filed: June 29, 2016
    Date of Patent: March 19, 2019
    Assignee: Lennox Industries Inc.
    Inventor: Malcolm Lloyd Alford
  • HVAC SYSTEMS HAVING IMPROVED FOUR-WAY VALVE REHEAT CONTROL
    Publication number: 20180003400
    Abstract: In one instance, a heating, ventilating, and air conditioning (HVAC) system includes a four-way reheat valve and is configured to accesses pressures within a conduit network to facilitate control of the reheat valve. The four-way reheat valve includes a piston valve slide within a main valve chamber and a pilot valve fluidly coupled to the main valve chamber and a compressor-suction conduit fluidly coupled to the four-way valve and to a compressor. The system also includes a flow-restricting device disposed on the conduit downstream of the four-way valve and a pilot conduit coupled to the conduit downstream of the flow-restricting device and coupled to the pilot valve for assisting with movement of the piston valve slide.
    Type: Application
    Filed: June 29, 2016
    Publication date: January 4, 2018
    Inventor: Malcolm Lloyd ALFORD