Patents by Inventor Lennart GÜRLET HÄGGSTRÖM

Lennart GÜRLET HÄGGSTRÖM 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: 11454115
    Abstract: A method for ensuring the quality of a multi-component mixture in a system for rock reinforcement is described herein. The system comprises a first and a second channel for a respective first and second component intended for injection in a rock hole. The respective channel comprises a pump and a container intended for the respective component. The method comprises the steps of pumping of the respective component from the respective container through the respective channel and continuously comparing the flow of the first component in the first channel with the flow of the second component in the second channel. The method further comprises the step of controlling the pumps individually, based on the comparison of the flows, in such a way that a deviation from a pre-defined volume ratio between the first component and the second component in the mixture is below a pre-defined first threshold.
    Type: Grant
    Filed: October 19, 2018
    Date of Patent: September 27, 2022
    Assignee: EPIROC ROCK DRILLS AKTIEBOLAG
    Inventors: Viktor Bergqvist, Martin Ekefalk, Johan Engblom, Lennart Gürlet Häggström, Jan Olsson
  • Publication number: 20210108514
    Abstract: A method for ensuring the quality of a multi-component mixture in a system for rock reinforcement is described herein. The system comprises a first and a second channel for a respective first and second component intended for injection in a rock hole. The respective channel comprises a pump and a container intended for the respective component. The method comprises the steps of pumping of the respective component from the respective container through the respective channel and continuously comparing the flow of the first component in the first channel with the flow of the second component in the second channel. The method further comprises the step of controlling the pumps individually, based on the comparison of the flows, in such a way that a deviation from a pre-defined volume ratio between the first component and the second component in the mixture is below a pre-defined first threshold.
    Type: Application
    Filed: October 19, 2018
    Publication date: April 15, 2021
    Applicant: EPIROC ROCK DRILLS AKTIEBOLAG
    Inventors: Viktor BERGQVIST, Martin EKEFALK, Johan ENGBLOM, Lennart GÜRLET HÄGGSTRÖM, Jan Olsson