Patents by Inventor Herbert Wenz

Herbert Wenz 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: 5520270
    Abstract: Vibrations of pipes or other components installed in a container such as a tank intended for holding liquids, are damped by surface area damping bodies, e.g. plates with through-holes that are immersed in the liquid in the container. These plates are rigidly connected to the pipes or components to be damped. The vibration damping plates are constructed of metal, for example, and the through-holes reduce the mass and advantageously affect the damping effect. The materials for making the perforated damping plates are selected to be compatible with the content of the containers, such as a fuel in a tank in a spacecraft. The surface area ratio of all cross-sectional areas of the through-holes to the total plate surface area is optimized to achieve a maximum damping effect. These perforated plates are secured to pipes, braces, filters, ducts, or other internal components of fuel tanks of land vehicles, aircraft, and spacecraft.
    Type: Grant
    Filed: April 3, 1995
    Date of Patent: May 28, 1996
    Assignee: Daimler-Benz Aerospace AG
    Inventors: Ernst Hornung, Huba Oery, Herbert Wenz
  • Patent number: 4716846
    Abstract: A sewing machine which is used with manual feed movement of a sewing material has a holding device for the material that is effective during the first phases of stitching of a seam section, by which the first thread knot is held from becoming undone when short thread ends and a large feed movement are used. In a first embodiment, the holding device includes a holding foot, by a drive mechanism in addition to a presser foot which is periodically moved up and down by a drive mechanism, and a controllable drive for the holding foot. In a second embodiment, the holding device includes a presser foot, a compression spring and a decoupling mechanism by which the presser foot can be disconnected from its drive mechanism.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: January 5, 1988
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Franz Schneider, Herbert Wenz, Gunter Link
  • Patent number: 4671197
    Abstract: A sewing machine with a needle bar mounted in a rocker, has a step motor drive for the oscillation of the rocker. A memory is used in which are contained selected digital data for influencing the step motor and a control unit is inserted between the memory and the step motor for selection and conversion of the digital data into stepping pulses for the step motor. A pulse generator operating synchronously with a main shaft of the sewing machine is used for triggering the transmission of stepping pulses to the step motor. To improve the drive transmission and to avoid reactions on the step motor, the step motor is connected to a lever arm of the rocker via an eccentric transmission.
    Type: Grant
    Filed: May 8, 1986
    Date of Patent: June 9, 1987
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Heinrich Bungert, Herbert Wenz
  • Patent number: 4643118
    Abstract: In a sewing machine with a feed device which comprises a feed wheel arranged next to a stitch formation point, driven synchronously with stitch formation tools, and mounted in a support provided at the housing of the sewing machine, in order to obtain an extremely exact drive in both directions, the feed wheel is placed in driving connection with a step motor. In a manner known in itself, the step motor receives stepping pulses which can be generated by a pulse generator operating synchronously with a main shaft of the machine and via a counting device that determines the feed amount. This feed amount is presettable by selectable digital data contained in a memory. In an arrangement wherein the feed wheel is connected to its drive via a deflection gearing and a transmission shaft mounted in the support, the deflection gearing consists of a ring gear attached to the feed wheel and of a pinion firmly connected to the transmission shaft.
    Type: Grant
    Filed: May 8, 1986
    Date of Patent: February 17, 1987
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Heinrich Bungert, Mathias Ulmen, Herbert Wenz
  • Patent number: 4587915
    Abstract: A method for approaching a predeterminable end point of a seam spaced from the edge of a workpiece, with a sewing machine which comprises an adjustable needle and lower transport, a sensor arranged before the needle and triggering the process for the positioning of the needle in the end point during passage through the edge, a pulse generator coupled with the main shaft of the sewing machine for the delivery of counting pulses for a pulse counter, and a micro-computer which controls the action of the feed means as a function of the pulses originating from the sensor and from the pulse generator. To execute a desired shortening of the length of one or more of the last stitches before the end point of a seam, the workpiece is moved back by the difference between the desired stitch length and the stitch length set by the setting device, before execution of the adjusted feed.
    Type: Grant
    Filed: November 20, 1984
    Date of Patent: May 13, 1986
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Herbert Wenz, Franz Schneider
  • Patent number: 4572093
    Abstract: A lubricating system for sewing machines is produced with the sewing machine running by cutting a predetermined amount of cotton fibers into small lengths and blowing the fiber lengths into the sewing machine housing. As the fibers fill the housing a felt cushion conformable to the paths of motion of the parts of the mechanism is produced. The felt cushion is supplied with oil through a wick.
    Type: Grant
    Filed: January 13, 1984
    Date of Patent: February 25, 1986
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Herbert Wenz, Dietmar Becker
  • Patent number: 4262615
    Abstract: A cover construction for a sewing machine work support column which is adapted to contain a looper and a thread-cutting device comprises an upright support member or column upon which a substantially L-shaped cover member is pivotal. The cover member includes a cover plate portion which extends horizontally in a closed position and covers the top of the device and a side portion which extends vertically in a closed position. The cover plate member is openable to a position opened outwardly from the support member in which position the cover is located in a vertical position and the side portion in a horizontal position. The side portion includes two bearing faces which are defined on the back and the bottom faces thereof, respectively, and which will abut against a top bearing surface of a locking member which is displaceable along the height of the upright support member.
    Type: Grant
    Filed: April 28, 1980
    Date of Patent: April 21, 1981
    Assignee: Pfaff Industriemaschinen GmbH
    Inventor: Herbert Wenz
  • Patent number: 4109334
    Abstract: The machine smoothes stitched seams on shoe shanks and applies a tape to cover the smoothed seam. A driven frictional wheel is cooperable with a second friction wheel rotatably mounted on a relatively elongated support over and along which the shanks are fed, the two friction wheels pressing and smoothing the stitched seams. Two holding elements are releasably engageable with this support at supporting points thereon spaced longitudinally of the support. A control circuit operates in such a manner that the two holding elements initially clamp the support at points spaced longitudinally therealong and, as a shoe shank leaves the friction wheels, the leading holding element is released for passage of the shoe shank therethrough while the trailing holding element remains clamped on the support. As the shoe shank clears the leading holding element, the latter is again clamped on the support and the trailing holding element is released from the support for passage of the shank.
    Type: Grant
    Filed: May 4, 1977
    Date of Patent: August 29, 1978
    Assignee: Pfaff Industriemaschinen GmbH
    Inventors: Heinrich Bungert, Herbert Wenz, Klaus Wentz