Patents by Inventor Franz Kirsching

Franz Kirsching 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).

  • Publication number: 20030173919
    Abstract: The invention relates to a braking module for an asynchronous motor, in particular that used in a circular saw. In order that the braking process can run its course as gently and noiselessly as possible, independently of the inertial moment of the element driven by the motor, according to the invention provision is made for switching means (1, 2, 3, S1-S5) for separating the stator windings (U, V, W) of the asynchronous motor from the operating-voltage supply (L1, L2, L3) and for applying a direct current voltage (G1, G2) to at least two stator windings (U, V) in order to brake the asynchronous motor, a measuring unit (9) for measuring a remanence voltage on at least one stator winding (W), and a control unit (12) for regulating a braking current, which, for the purpose of braking, flows through the stator windings affected by the direct current voltage, in dependence on the measured remanence voltage.
    Type: Application
    Filed: January 21, 2003
    Publication date: September 18, 2003
    Inventors: Wilfried Altendorf, Karsten Barner, Thomas Stiller, Franz Kirsch
  • Patent number: 5370039
    Abstract: A short travel pneumatic cylinder device for transmitting a high force, comprising a cylinder housing having a cylindrical bore for guiding of the piston and of the piston rod, two pistons which upon generation of an overatmospheric pressure between the pistons will move in opposite direction, and further comprising a mechanical lever system with a housing cover. The first of the pistons is connected with the piston rod, and the second of the two pistons is arranged coaxially relative to the first piston, is hollow, and is movable coaxially relative to the piston rod. The first of the two pistons is connected to the lever system at the side of the interior of the cylinder opposite to the second of the two pistons. The pressure force exerted by the second piston is transmitted to the piston rod via the lever system in a direction opposite to the direction of movement of the second piston.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: December 6, 1994
    Inventor: Franz Kirsching