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Ballbarrow
The Ballbarrow was a variation of the wheelbarrow design,〔(【引用サイトリンク】url=http://deconstructingproductdesign.com/dyson-ballbarrow/ )〕 by James Dyson and was released in 1974 in the UK.〔(【引用サイトリンク】url=http://www.telegraph.co.uk/technology/picture-galleries/8759473/Top-ten-machines-developed-by-Dyson.html )〕 It featured a moulded plastic hopper on a steel frame and a spherical plastic wheel, allowing increased maneuverability. Compared to a conventional design, Dyson said the larger surface area of the ball made the wheelbarrow easier to use in soft soil, and more laterally stable with heavy loads on uneven ground.〔(【引用サイトリンク】url=http://content.dyson.co.uk/insideDyson/article.asp?aID=ballbarrow )〕
The original design featured a galvanised steel hopper. Later, the design was changed to a plastic hopper, with an optional clip-on height-extension piece.〔"(Ballbarrow floats on mud )", ''Popular Science'', February 1976〕
The Ballbarrow won the Building Design Innovation Award in 1977.〔(【引用サイトリンク】url=http://oxfordindex.oup.com/view/10.1093/oi/authority.20110803095738244 )〕 Dyson continued with the ball-wheel concept in his design for the Trolleyball boat launcher in 1978, and the DC15 vacuum cleaner in 2005.
==References==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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