Patents by Inventor Mietek RATAJ

Mietek RATAJ 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).

  • TENSION INDICATOR FOR A ROCK BOLT
    Publication number: 20230175397
    Abstract: A tension indication device for a rock bolt includes a support washer, a cover member having a central hole for receiving a trailing portion of the rock bolt, and an indicator substance provided in a first space in the cover member or in a recess in the support washer for facing the nut. Upon rotation of the nut, indicator substance is forced out of the first space such that the indicator substance is visible at inspection of the rock bolt, thereby indicating that the rock bolt has been tensioned.
    Type: Application
    Filed: May 12, 2021
    Publication date: June 8, 2023
    Inventors: Steven WEAVER, Osvaldo VALLATI, Mietek RATAJ
  • Friction rock bolt
    Patent number: 11585220
    Abstract: A friction rock bolt assembly is arranged to frictionally engage an internal surface of a bore formed in rock strata. The rock bolt includes an expander mechanism having at least two radially outer wedge elements engageable by an inner wedge element. The expander mechanism is configured for symmetrical displacement of the expander elements to provide controlled enlargement by the rock bolt within the borehole for secure anchorage.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: February 21, 2023
    Assignee: SANDVIK INTELLECTUAL PROPERTY AB
    Inventors: Bradley Darlington, Peter Young, Mietek Rataj
  • Friction rock bolt
    Patent number: 11131190
    Abstract: A friction rock bolt assembly is arranged to frictionally engage an internal surface of the bore formed in rock strata. The rock bolt includes a loading mechanism provided at a rearward end of the rock bolt having a load absorber to absorb an initial predetermined loading force followed by transfer of the force to a main load element.
    Type: Grant
    Filed: May 9, 2018
    Date of Patent: September 28, 2021
    Assignee: Sandvik Intellectual Property AB
    Inventors: Bradley Darlington, Peter Young, Mietek Rataj
  • FRICTION ROCK BOLT
    Publication number: 20200063558
    Abstract: A friction rock bolt assembly is arranged to frictionally engage an internal surface of the bore formed in rock strata. The rock bolt includes a loading mechanism provided at a rearward end of the rock bolt having a load absorber to absorb an initial predetermined loading force followed by transfer of the force to a main load element.
    Type: Application
    Filed: May 9, 2018
    Publication date: February 27, 2020
    Inventors: Bradley DARLINGTON, Peter YOUNG, Mietek RATAJ
  • FRICTION ROCK BOLT
    Publication number: 20200063556
    Abstract: A friction rock bolt assembly is arranged to frictionally engage an internal surface of a bore formed in rock strata. The rock bolt includes an expander mechanism having at least two radially outer wedge elements engageable by an inner wedge element. The expander mechanism is configured for symmetrical displacement of the expander elements to provide controlled enlargement by the rock bolt within the borehole for secure anchorage.
    Type: Application
    Filed: May 9, 2018
    Publication date: February 27, 2020
    Inventors: Bradley DARLINGTON, Peter YOUNG, Mietek RATAJ
  • Mesh clamp
    Patent number: D949676
    Type: Grant
    Filed: November 27, 2018
    Date of Patent: April 26, 2022
    Assignees: Sandvik Mining and Construction Australia Pty Ltd, Sandvik Mining and Construction Tools AB
    Inventors: Warren Roach, Peter Young, Mietek Rataj, Bradley Darlington
  • Mesh clamp
    Patent number: D982428
    Type: Grant
    Filed: March 18, 2021
    Date of Patent: April 4, 2023
    Assignee: Sandvik Mining and Construction Australia Pty Ltd.
    Inventors: Warren Roach, Peter Young, Mietek Rataj, Bradley Darlington