Patents by Inventor Samuel A. Roberts

Samuel A. Roberts 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 for central heating system
    Patent number: 4213745
    Abstract: A pump for a central heating system having a tubular housing and a motor for driving an axial flow impeller which is mounted within the housing, the motor having casing mounted within the tubular housing, forming a liquid flow passage between the outer surface of the casing and the inner surface of the housing, the motor being adapted to be powered by electricity supply of a frequency greater than 70 Hertz, wherein the impeller is mounted upstream of the motor, and guide vanes are mounted in the annular passage to smooth the flow of liquid from the impeller.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: July 22, 1980
    Inventor: Samuel A. Roberts