Patents by Inventor Robert Doherty

Robert Doherty 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).

  • Direct mount pressure control with a field adjustable trip point and reset point
    Patent number: 5304759
    Abstract: A pressure control for use in applications such as refrigeration, air conditioning and ice generating machinery includes a highly accurate snap acting switch, field adjustable trip points and reset points and a reference scale. The trip point is adjusted by means of an adjustment screw, while the reset point is adjusted by changing the differential, or the difference between the trip point and reset point. The differential is adjusted by adjusting the amount of "lost motion" within the control by employing an actuator which includes a cam surface and means for changing the position of the cam surface.
    Type: Grant
    Filed: October 15, 1992
    Date of Patent: April 19, 1994
    Assignee: Johnson Service Company
    Inventor: Robert Doherty