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A Schrader valve advertisement in the journal Horseless Age, 1918. August Schrader (1807–1894) was a German-American inventor and mechanic. He is known for inventing the Schrader valve .
The Schrader valve (also called American valve [1]) is a type of pneumatic tire valve used on virtually every motor vehicle in the world today. The Schrader company, for which it was named, was founded in 1844 by August Schrader. The original Schrader valve design was invented in 1891, and patented in the United States in 1893. [2]
Also, pressure valves can be used on Schrader valves in place of caps in order to measure the pressure of pneumatic tires. In 1891, George Schrader, the son of German-American immigrant August Schrader, invented the Schrader valve. A patent was issued on April 11, 1893. [26] 1892 Bottle cap
August Schrader (1807–1894), U.S. – Schrader valve for Pneumatic tire; David Schwarz (1852–1897), Croatia, – rigid airship, later called Zeppelin; Raymond Scott (1908–1994), U.S. – inventor and developer of electronic music technology; Girolamo Segato (1792–1836), Italy – artificial petrifaction of human cadavers
Presta valves (also called Sclaverand valves or French valves) are normally only used on bicycles. The stem has a narrower diameter (nominally 6 mm) than the thinnest (nominally 8 mm) Schrader type, and so the bore of the hole in the rim through which the stem passes can be smaller. Has a locknut that needs to be opened to inflate/deflate. [17 ...
It has a connection or adapter for use with one or both of the two most common types of valves used on bicycles, Schrader or Presta. A third type of valve called the Dunlop (or Woods) valve exists, but tubes with these valves can be filled using a Presta pump. [1] [2] Several basic types are available: Floor pumps; Frame-mounted; Compact or ...
The valve cap protects the valve body, keeps dirt and mud out of the mechanism, and also prevents the valve from damaging the tube when it is rolled for storage, but is not necessary to prevent pressure loss. The holes in rims sized for Presta valves can be enlarged to accommodate the wider Schrader valves, which can structurally weaken the rim.
The word poppet shares etymology with "puppet": it is from the Middle English popet ("youth" or "doll"), from Middle French poupette, which is a diminutive of poupée.The use of the word poppet to describe a valve comes from the same word applied to marionettes, which, like the poppet valve, move bodily in response to remote motion transmitted linearly.