ALEXANDRIA, Va., June 18 -- United States Patent no. 12,326,086, issued on June 10, was assigned to Sandvik Mining and Construction Oy (Tampere, Finland).
"Apparatus for resin injection, mining machine and method" was invented by Pasi Ruotsalainen (Tampere, Finland).
According to the abstract* released by the U.S. Patent & Trademark Office: "An apparatus for injecting grouting material, mining machine and method of injecting grouting resin into several drilled holes is provided. The apparatus includes an injector head provided with a mixing device, which are both insertable into a drilled hole by a flexible feed hose. The injector head includes a valve assembly mounted inside a distal end portion of the feed hose."
The patent was filed o...