Patents by Inventor Ralph Eugene Blackman

Ralph Eugene Blackman 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).

  • Hot water extraction unit having electrical immersion heater
    Patent number: 4046989
    Abstract: Means for varying the heating rate of an immersion heater in a hot-water extraction unit comprising a solution tank in which an electrical immersion heater is mounted in order to decrease the warm-up time of the unit. In the preferred embodiment, the means comprise (a) a first heating element having a first watt rating; (b) a second heating element having a second watt rating, lower than the first watt rating; and (c) means for selectively actuating one or the other of the two heating elements.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: September 6, 1977
    Assignee: Parise & Sons, Inc.
    Inventors: Carl Parise, Ralph Eugene Blackman, James M. Wimsatt