Patents by Inventor Hubert Gervais

Hubert Gervais 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).

  • Air duct
    Patent number: 5372544
    Abstract: An automatic ventilator closure which operates on the basis of a pressure differential condition within the conduit is provided with an air flow detector to ensure that the control system for the closure does not cycle. The pressure sensor and air flow detector are both in the form of vanes that are integrally connected to each other.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: December 13, 1994
    Inventor: Hubert Gervais
  • Air vent closure system
    Patent number: 5081913
    Abstract: An automatic ventilator closure is described which operates on the basis of an over-pressure within the conduit leading up to the ventilator outlet. Electrical interlocks control a motor to place the closure in an open or closed condition.
    Type: Grant
    Filed: May 18, 1990
    Date of Patent: January 21, 1992
    Inventor: Hubert Gervais
  • Air vent closure system
    Patent number: RE35199
    Abstract: An automatic ventilator closure is described which operates on the basis of an over-pressure within the conduit leading up to the ventilator outlet. Electrical interlocks control a motor to place the closure in an open or closed condition.
    Type: Grant
    Filed: January 21, 1994
    Date of Patent: April 2, 1996
    Inventor: Hubert Gervais