Patents by Inventor Ewald Garrecht

Ewald Garrecht 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).

  • Device for flux-free soldering
    Patent number: 5762257
    Abstract: The present invention pertains to a device for the flux-free soldering of printed circuit boards guided over the soldering wave of a wave soldering nozzle, wherein the solder is vibrated by means of at least one ultrasonic electrode (sonotrode), the surface of the sonotrode is directly rinsed by the soldering wave, and the printed circuit boards are guided just above the surface of the sonotrode. It is provided that the surface (12, 28) of the sonotrode (5, 21) forms at least a partial area of the surface of the wave former (11, 13) of the wave soldering nozzle (2, 22).
    Type: Grant
    Filed: August 29, 1995
    Date of Patent: June 9, 1998
    Assignee: ERSA Lottechnik GmbH
    Inventor: Ewald Garrecht
  • Desoldering apparatus
    Patent number: 4412641
    Abstract: A device for desoldering electronic components from circuit boards has a soldering nozzle which produces a solder wave that is directed from below the circuit board against the component to be desoldered; thereby dissolving previous solder bonds. The component can then be lifted out from above and suction is applied from below to the now-opened bores of the circuit board, to remove residual solder from them. A new component can then be installed, using the same equipment.
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: November 1, 1983
    Assignee: Ersa Ernst Sachs GmbH & Co. KG
    Inventors: Gottfried Fuchs, Ewald Garrecht, Lothar Rieck, Wolfgang Ruppel, Rudolf Schwarz, Erich Siegle