Patents by Inventor Joseph Malcolm

Joseph Malcolm 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).

  • Constant supply of vacuum or pressure for vacuum or pressure operated or assisted systems in vehicles
    Patent number: 3948343
    Abstract: A vacuum or pressure unit to be incorporated in a vacuum or pressure system of a vehicle which operates, or assists in the operation of, at least one vehicle component, the vacuum or pressure unit comprising a pump in fluid communication with the vacuum or pressure system of the vehicle, an electric motor operatively connected to the pump to drive the pump and connected to a source of electrical energy via a pressure responsive electric switch mounted in the vacuum or pressure system of the vehicle, the pressure responsive electric switch being intended to close the electrical circuit between the electric motor and the electrical energy source to activate the electric motor upon the magnitude of the pressure in the vacuum or pressure system being insufficient to operate or assist in the operation of the vehicle components at the desired efficiency.
    Type: Grant
    Filed: October 21, 1974
    Date of Patent: April 6, 1976
    Inventor: Joseph Malcolm