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Johan Petter Johansson (December 12, 1853 – August 25, 1943), sometimes known as JP, was a Swedish inventor and industrialist. He invented a modern adjustable spanner [1] (patents in 1891 and 11 May 1892). He obtained over 100 patents in total.
The story of Bahco began in 1886 when the Swedish inventor Johan Petter Johansson (1853–1943) established his company Enköpings Mekaniska Verkstad in Enköping, Sweden. Johan Petter, also known as JP, was an inventor and industrialist. He invented the modern plumber wrench (1888) and adjustable wrench (patents in 1891 and 1892). [1]
A plumber wrench A plumber wrench, with the key ring on the thread of the left handle Johan Petter Johansson with his wrench. A plumber wrench (or plumber's wrench, pipe wrench, Swedish wrench or Swedish pattern wrench [1]) is a form of plier described as a pipe wrench that uses compound leverage to grip and rotate plumbing pipes.
On 17 August 1888, the Swedish inventor Johan Petter Johansson (1853-1943) took out his first patent on the adjustable pipe wrench. [3] The Swedish Patent Office issued the patent again in 1894. [4] The idea emerged after he established his company Enköpings Mekaniska Verkstad. Back then, nut dimensions were poorly standardized, so each time a ...
An adjustable spanner (UK and most other English-speaking countries), also called a shifting spanner (Australia and New Zealand) [1] or adjustable wrench (US and Canada), [a] is any of various styles of spanner (wrench) with a movable jaw, allowing it to be used with different sizes of fastener head (nut, bolt, etc.) rather than just one fastener size, as with a conventional fixed spanner.
Harry Mendell, U.S. – invented the first digital sampling synthesizer; Joy Mangano (born 1956), U.S. – household appliances; Anna Mangin (1844–1931) – American inventor, educator, caterer and women's rights campaigner; Charles Mantoux (1877–1947), France – Mantoux test (tuberculosis) Guglielmo Marconi (1874–1937), Italy – radio ...
Monkey wrenches are still manufactured and are used for some heavy tasks, but they have otherwise been mostly replaced by the shifting adjustable wrench/spanner, which is much lighter and has a smaller head, allowing it to fit more easily into tight spaces, and the tooth-jawed, torque-gripping pipe wrench.
A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and bolts—or keep them from turning. In the UK, Ireland, Australia, and New Zealand spanner is the standard term. The most common shapes are called open-ended spanner and ring spanner.