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A jackhammer (pneumatic drill or demolition hammer in British English) is a pneumatic or electro-mechanical tool that combines a hammer directly with a chisel. It was invented by William McReavy, who then sold the patent to Charles Brady King. [1] Hand-held jackhammers are generally powered by compressed air, but some are also powered by ...
A breaker is a powerful percussion hammer fitted to an excavator for demolishing hard (rock or concrete) structures. It is powered by an auxiliary hydraulic system from the excavator, which is fitted with a foot-operated valve for this purpose.
A large hammer-like tool is a maul (sometimes called a "beetle"), a wood- or rubber-headed hammer is a mallet, and a hammer-like tool with a cutting blade is usually called a hatchet. The essential part of a hammer is the head, a compact solid mass that is able to deliver a blow to the intended target without itself deforming.
A drilling hammer, [5] club hammer, lump hammer, crack hammer, mini-sledge or thor hammer is a small sledgehammer whose relatively light weight and short handle allow one-handed use. [6] It is useful for light demolition work, driving masonry nails, and for use with a steel chisel when cutting stone or metal. [7]
Taran Killam, Ana Gasteyer, John Mulaney, Kristen Wiig, Kenan Thompson, Paul Davidson, Maya Rudolph, Will Forte, and Jason Sudeikis perform during the "SNL50" live special.
The London Hammer (also known as the "London Artifact") is a hammer made of iron and wood that was found in London, Texas in 1936. Part of the hammer is embedded in a limey rock concretion , leading to it being regarded by some as an anomalous artifact .
German company Bosch produced the first "Bosch-Hammer" around 1932 in mass production. The US company Milwaukee Electric Tool Corporation states that in 1935, it was selling a lightweight 1 ⁄ 4 in (6.4 mm) electric hammer drill (cam-action). [15] Hand-cranked percussion drills were made in the UK in the mid-twentieth century. [16]
The National Federation of Demolition Contractors Ltd is a UK trade association representing businesses involved in demolition work, and is headquartered in Hemel Hempstead, Hertfordshire. [1] It describes itself as the Voice of the Global Demolition Industry .