Patents Examined by Elyin G. Enad
  • Method and apparatus for increasing the efficiency of electrical rotary machines
    Patent number: 5517072
    Abstract: An improved electric motor having a commutator and brushes incorporates a fluid comprising one or more stable halogenated aliphatic hydrocarbons which is liquid from ambient temperatures up to about 150.degree. F., and means for applying said fluid continuously to brushes adjacent said commutator while the apparatus is running.
    Type: Grant
    Filed: October 11, 1994
    Date of Patent: May 14, 1996
    Assignee: Efficient Propulsion, Inc.
    Inventor: James J. Hildebrandt