A rock splitting tool having elongate laterally expanding metal pressure bars or feathers and an axial sliding wedge or spreader for radially separating the feathers, the wedge being driven by the combined and superimposed forces of a hydraulic thrust servomotor and an impact hammer. The driving paths for transmitting forces to the wedge are coaxial and partially in series and partially in parallel.
G. B. Clark and T. F. Lehnhoff, "Thrust-Impact Rock-Splitter," U.S. Patents, Jan 1978.
Mechanical and Aerospace Engineering
Patent Application Number
© 1978 The Curators of the University of Missouri, All rights reserved.
01 Jan 1978