Patents by Inventor Harold T. Lange, Sr.

Harold T. Lange, Sr. 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).

  • Thermostatic expansion valve with bi-directional flow
    Patent number: 4978062
    Abstract: This thermostatic expansion valve (2) for heating-cooling refrigeration systems includes a body (4,8) having a transverse linear flow channel (10) therethrough. A tapered control valve element (12) divides the flow into identical inflow-outflow chambers (14,16) having equally sized inflow-outflow ports (22,24). The control valve element (12), when seated, prevents flow between the chambers (14,16), and is urged into a normally closed position by a biasing spring (26). A motor assembly (6) responsive to evaporator outlet pressure or compressor suction pressure, and temperature also controls movement of the valve element (12).
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: December 18, 1990
    Assignee: Sporlan Valve Company
    Inventor: Harold T. Lange, Sr.