Patents by Inventor Stig Ingemansson

Stig Ingemansson 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).

  • Perforated sound absorbing panel
    Patent number: 4830140
    Abstract: A perforated panel having a thickness of at least about 6 mm, for use as a sound absorbing element, especially at lacunarias. Each perforation is covered by a thin fiber cloth which is bonded to the edges of the perforation, rendering said panel element a specific acoustic flow resistance of between 1200 and 4000 Nsm.sup.-3.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: May 16, 1989
    Assignee: Gyproc AB
    Inventors: Lars Fridh, Stig Ingemansson
  • Blowing nozzle for a highly pressurized gaseous fluid
    Patent number: 4767061
    Abstract: A blowing nozzle for a highly pressurized gaseous fluid comprising at least two narrow slot-form exhaust passages (12) having a width (d) insignificantly larger than the size of polluting particles occurring in said fluid and a length (L) no more than ten times the average width (d) of each slot, the exhaust passages extending in parallel or radially over the end surface of the nozzle in a projection perpendicular to its longitudinal axis.
    Type: Grant
    Filed: January 28, 1987
    Date of Patent: August 30, 1988
    Assignee: Ingemanssons Ingenjorsbyra AB
    Inventor: Stig Ingemansson