US Patent Issued to Sandvik Mining and Construction on Oct. 27 for "Control valve and impact device" (Finnish Inventors)

ALEXANDRIA, Va., Oct. 27 -- United States Patent no. 12,773,768, issued on Oct. 27, was assigned to Sandvik Mining and Construction Oy (Tampere, Finland).

"Control valve and impact device" was invented by Antti Koskimaki (Tampere, Finland), Timo Kela (Tampere, Finland), Mikko Hamalainen (Tampere, Finland) and Lars Kandelin (Tampere, Finland).

According to the abstract* released by the U.S. Patent & Trademark Office: "A control valve, an impact device for a rock breaking apparatus, and a method are provided. The control valve is an elongated piece with a central axis and radial outer and inner surfaces (Ros, Ris). The control valve includes several control surfaces disposed at axial distances from each other for controlling hydraulic fluid...