Patents by Inventor Stefan HASLER

Stefan HASLER 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).

  • Hydraulic drive motor control system
    Patent number: 11827456
    Abstract: A hydraulic system is arranged to control a plurality of drive motors suitable for driving conveying apparatus such as a conveyor belt. The hydraulic system includes a modular master and slave hydraulic units implemented as hydraulic circuits in which pressure sensors and pressure reducing valves provide speed, torque and directional control.
    Type: Grant
    Filed: July 6, 2018
    Date of Patent: November 28, 2023
    Assignee: Sandvik Mining and Construction G.m.b.H.
    Inventors: Stefan Hasler, Christian Umundum
  • Heading machine with cusp cutter
    Patent number: 11299987
    Abstract: A heading machine includes first and second rotating cutting heads each having an axis of rotation extending substantially in a longitudinal direction of the machine, a first cutting roller having an axis of rotation extending substantially horizontal and transverse to the longitudinal direction of the machine, and a further cutting device supported on the cutting frame and arranged to cut off the cusps of unmined material left on side wall. The machine further includes a side stabilizer, and can cut a rectangular profile without leaving cusps left on the side wall.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: April 12, 2022
    Assignee: Sandvik Mining and Construction G.m.b.H.
    Inventors: Ralf Grief, Stefan Hasler, Karl Irregger, Stefan Steiner, Gerhard Weinberger
  • HYDRAULIC DRIVE MOTOR CONTROL SYSTEM
    Publication number: 20210229924
    Abstract: A hydraulic system is arranged to control a plurality of drive motors suitable for driving conveying apparatus such as a conveyor belt. The hydraulic system includes a modular master and slave hydraulic units implemented as hydraulic circuits in which pressure sensors and pressure reducing valves provide speed, torque and directional control.
    Type: Application
    Filed: July 6, 2018
    Publication date: July 29, 2021
    Inventors: Stefan HASLER, Christian UMUNDUM
  • HEADING MACHINE WITH CUSP CUTTER
    Publication number: 20210047926
    Abstract: A heading machine includes first and second rotating cutting heads each having an axis of rotation extending substantially in a longitudinal direction of the machine, a first cutting roller having an axis of rotation extending substantially horizontal and transverse to the longitudinal direction of the machine, and a further cutting device supported on the cutting frame and arranged to cut off the cusps of unmined material left on side wall. The machine further includes a side stabilizer, and can cut a rectangular profile without leaving cusps left on the side wall.
    Type: Application
    Filed: January 31, 2018
    Publication date: February 18, 2021
    Inventors: Ralf GRIEF, Stefan HASLER, Karl IRREGGER, Stefan STEINER, Gerhard WEINBERGER