US Patent Issued on April 29 for "Impact controller for primary rock breakage" (New York Inventor)

ALEXANDRIA, Va., June 9 -- United States Patent no. 12,286,883, issued on April 29.

"Impact controller for primary rock breakage" was invented by Robert H. Dalrymple (Pine City, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A mining apparatus for primary breakage having a drop hammer with a drop weight that may fall from a first position where the drop weight is suspended within an upper end of the drop hammer and a second position where the drop weight extends from a lower end of the drop hammer. The mining apparatus has a shock absorber assembly coupled to the lower end of the drop hammer with a first passageway through which the drop weight may pass. The mining apparatus also has a rebound cage coup...