Ballbarrow
{{Short description|Wheelbarrow variation}}
The Ballbarrow was a variation of the wheelbarrow design,{{cite web|title=Dyson Ballbarrow|url=http://deconstructingproductdesign.com/dyson-ballbarrow/|website=Deconstructing Product Design|date=29 September 2008 |accessdate=24 May 2015}} by James Dyson released in 1974 in the UK.{{cite web|title=Top Ten Machines Developed by Dyson|url=https://www.telegraph.co.uk/technology/picture-galleries/8759473/Top-ten-machines-developed-by-Dyson.html|website=The Telegraph Online|accessdate=24 May 2015}} It featured a moulded plastic hopper on a steel frame and a spherical plastic wheel, allowing increased manoeuvrability. Dyson said that the surface area of the ball, larger than that of a conventional design, made the ballbarrow easier to use in soft soil and more laterally stable with heavy loads on uneven ground.{{cite web|title=Inside Dyson: Ballbarrow |url=http://content.dyson.co.uk/insideDyson/article.asp?aID=ballbarrow |accessdate=4 November 2013 |url-status=dead |archiveurl=https://web.archive.org/web/20130618072657/http://content.dyson.co.uk/insidedyson/article.asp?aID=ballbarrow |archivedate=June 18, 2013 }}
The original design featured a galvanised steel or copper hopper, forming integral rear legs. Conventional barrows use a bend in the frame to form these legs. Later the design was changed to a plastic hopper, with an optional clip on height-extension piece."[https://books.google.com/books?id=xAEAAAAAMBAJ&dq=ballbarrow&pg=PA75 Ballbarrow floats on mud]", Popular Science, February 1976
The Ballbarrow won the Building Design Innovation Award in 1977.{{cite web|title=James Dyson|url=http://oxfordindex.oup.com/view/10.1093/oi/authority.20110803095738244|website=Oxford Index|accessdate=24 May 2015}} Dyson continued with the ball-wheel concept in his design for the Trolleyball boat launcher in 1978, and the DC15 vacuum cleaner in 2005.
Dyson claimed his failure to maintain control of his invention by assigning the patent for the Ballbarrow to the company, and subsequently losing control over the company in the early 1970s, marked his biggest mistake in business.{{cite news |last=Dyson |first=James |date=2011-10-22 |title=My Biggest Mistake: James Dyson|url=https://www.independent.co.uk/news/business/my-biggest-mistake-james-dyson-1392336.html |work=The Independent |accessdate=21 April 2021}}