Patents by Inventor Evan Ruach

Evan Ruach 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).

  • Duct silencer
    Patent number: 6589112
    Abstract: A ventilation duct and methods of ventilation are disclosed. The ventilation duct provides a plurality of inner and outer sound absorbing members. The inner and outer sound absorbing members lying in separate planes with portions of the inner and outer sound absorbing members overlapping one another to inhibit the transmission of sound through the duct. The inner and outer sound absorbing members each including a longitudinal cavity filled with a sound absorbing material and having a plurality of sound transmission passages extending through the members to expose the sound absorbing material to incoming sound waves. In addition, the members may be shaped to have a reverse megaphone effect to further reduce the sound transmitted across the duct.
    Type: Grant
    Filed: December 21, 2001
    Date of Patent: July 8, 2003
    Inventor: Evan Ruach
  • Duct silencer
    Publication number: 20020115406
    Abstract: A ventilation duct and methods of ventilation are disclosed. The ventilation duct provides a plurality of inner and outer sound absorbing members. The inner and outer sound absorbing members lying in separate planes with portions of the inner and outer sound absorbing members overlapping one another to inhibit the transmission of sound through the duct. The inner and outer sound absorbing members each including a longitudinal cavity filled with a sound absorbing material and having a plurality of sound transmission passages extending through the members to expose the sound absorbing material to incoming sound waves. In addition, the members may be shaped to have a reverse megaphone effect to further reduce the sound transmitted across the duct.
    Type: Application
    Filed: December 21, 2001
    Publication date: August 22, 2002
    Inventor: Evan Ruach