Who invented the jackhammer?

Answer 1

In 1896 J. George Leyner invented the hammer drill, also known as the jackhammer. In 1902 construction company Ingersoll Rand utilized Leyner's hammer drill design to create the first portable compressor line of hammer drills. The construction workers who built the Panama Canal and Mount Rushmore used these portable compressor drills.

Answer 2

Richard Dudgeon, Inc. was founded in New York City as a machine shop. In 1851, founder and inventor Richard Dudgeon was granted a patent for a "portable hydraulic press" - the hydraulic jack, a jack which proved to be vastly superior to the screw jacks in use at the time. In 1855, Richard Dudgeon astounded New Yorkers by driving from his home to his place of business in an innovative steam carriage. The noise and vibration generated by the "Red Devil Steamer" frightened horses so badly that city authorities confined it to one street. Although the inventor claimed the carriage could carry 10 people at 14 m.p.h. on one barrel of anthracite coal, it was too far ahead of its time and failed to gain popular favor. Other inventions attributed to Dudgeon include: roller boiler tube expanders, pulling jacks, filter press jacks, steam forging hammers, railroad lifting equipment, heavy plate hydraulic hole punches, and many types and sizes of lifting jacks.