Patents Assigned to Frank Apostol
  • Power-converting device
    Patent number: 4167375
    Abstract: A power-converting device has a generally-elliptical rotor which is mounted within a generally-cylindrical chamber. That rotor reciprocates as it rotates within that chamber; and interacting surfaces which are wholly separate from, displaced bodily away from, and in addition to the shaft of that power-converting device halt continued movement of that rotor whenever it reaches an end of its path of reciprocation, and then smoothly start that rotor moving back toward the opposite end of that path of reciprocation.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: September 11, 1979
    Assignee: Frank Apostol
    Inventor: Niranjan K. Doshi
  • Power-converting device
    Patent number: 4061445
    Abstract: A positive-displacement, steam-driven engine has a generally-elliptical rotor which is mounted within a cylindrical chamber. That rotor reciprocates as it rotates within that chamber; and interacting surfaces halt continued movement of that rotor whenever it reaches an end of its path of reciprocation, and then smoothly start that rotor moving back toward the opposite end of that path of reciprocation.
    Type: Grant
    Filed: May 10, 1976
    Date of Patent: December 6, 1977
    Assignee: Frank Apostol
    Inventor: Niranjan Kumar Doshi