Johan Petter Johansson
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Johan Petter Johansson, sometimes known as JP, was a Swedish inventor and industrialist. He invented a modern adjustable spanner. He obtained over 100 patents in total.
J. P. Johansson with his favourite tool and invention, the plumber wrench. In his breast pocket, an adjustable spanner, also invented by him.
J. P. Johansson's grave in Enköping
Plumber wrench
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A plumber wrench is a form of plier described as a pipe wrench that uses compound leverage to grip and rotate plumbing pipes. Similar to the action of a Vise Grip plier, its jaw opening is adjusted to
Johan Petter Johansson
…Workshop of Enköping), which quickly became a successful venture. It was during the years in his workshop that he invented the adjustable spanner and the plumber wrench. In 1890, B.A. Hjorth & Company agreed to distribute his tools worldwide under the "Bahco" trademark. The Bahco tools are still in production, having…
A plumber wrench
A plumber wrench, with the key ring on the thread of the left handle