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In 2016 the teacher of the class, Peter Winklhofer, made the PDF plans available to enable other carpenters and students to build their own versions of the case. [ 15 ] In 2015, the design of Hitachi's micro-sized Hit-Case stacking boxes was registered in the name of Yi-Hung Lin. [ 16 ]
A continuous flight auger drill is used to excavate a hole and concrete is injected through a hollow shaft under pressure as the auger is extracted. Reinforcement is then inserted after the auger is removed. [1] This creates a continuous pile without ever leaving an open hole.
A skid-steer loader with an earth auger attachment. Construction drill auger. Hand-powered earth augers are typically used to plant saplings and trees or to set up posts for fences or other ends. [7] Large mechanized earth augers, called drilling rigs, are used to make holes for piles destined to be deep foundations or retaining wall. [citation ...
Study of a man using an auger, from The Seven Sorrows of the Virgin, by Albrecht Dürer, c. 1496. The classical design has a helical screw blade winding around the bottom end of the shaft. The lower edge of the blade is sharpened and scrapes the wood; the rest of the blade lifts the chips out of the way.
In 1937, the Australian-born Thomas Carroll, working for Massey-Harris in Canada, perfected a self-propelled model and in 1940, a lighter-weight model began to be marketed widely by the company. [13] Lyle Yost invented an auger that would lift grain out of a combine in 1947, making unloading grain much easier and further from the combine. [ 14 ]