Patents Assigned to Kockum Sonics AB
  • Sound generator
    Patent number: 5910648
    Abstract: In a sound generator of the type having a motor powered piston (7-9) limiting a chamber (18) connected to a resonance tube (16) and which is adapted to generate sound waves for cleaning heat exchange surfaces, the piston (7-9) is according the invention provided with two axially spaced piston membranes (8, 9) and a device (19) for establishing a vacuum between the two membranes (8, 9) and thus ensuring only tensile stresses in membranes (8, 9) thereby increasing their life time.
    Type: Grant
    Filed: March 9, 1998
    Date of Patent: June 8, 1999
    Assignee: Kockum Sonics AB
    Inventor: Mats Moritz