Patents by Inventor Gerschwiler Othmar

Gerschwiler Othmar 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).

  • Patent number: 5350026
    Abstract: In a power-driven electrical hand tool, especially an electric screwdriver, with a coupling that undoes the drive connection between driving electric motor and tool output shaft when the working process is complete, and with an output shaft mounted so as to be displaced axially with a depth stop, it is proposed that the coupling be configured as a friction coupling which produces the drive connection at least predominantly by frictional engagement on the basis of the applied pressure exerted on the output shaft, which friction coupling separates the drive connection again when the applied pressure is reduced or absent, force deflection elements being provided that transmit the pressure effect received from the applied pressure via the output shaft, with concurrent amplification, to the annular coupling surfaces effecting the nonpositive frictional entrainment.
    Type: Grant
    Filed: November 25, 1992
    Date of Patent: September 27, 1994
    Assignee: Ceka Electrowerkzeuge AG & Co. KG
    Inventors: Heule Markus, Gerschwiler Othmar