Patents Assigned to Grace Dudley
  • Hot gas engine
    Patent number: 4444011
    Abstract: A hot gas engine has an elastic and a lost motion connection between the working piston and the displacer, resulting in a rapid shifting of the displacer between its extreme positions. The hot and cold walls between which the displacer reciprocates are substantially planar and parallel, and the displacer is in the shape of a plate. The working piston comprises a diaphragm, so that there is no loss of working gas from the motor chamber.
    Type: Grant
    Filed: April 7, 1981
    Date of Patent: April 24, 1984
    Assignee: Grace Dudley
    Inventor: Ivo Kolin