Pneumatic Tires
The majority of tires utilized in contemporary times are considered to be pneumatic tires. The use of rubber in tires enabled the invention of pneumatic tires which allowed for a much more comfy ride. The contemporary transportation system of the world completely relies on pneumatic tires.
The pneumatic tire is a durable rubber tire and is then compressed with air. Motorized vehicles like trucks, buses, cars, motorcycles and airplanes all use pneumatic tires. Wheeled vehicles which are not motorized, such as bicycles, also use pneumatic tires.
History
The history of tires begins with the invention of iron bands around wooden wheels. The utilization of solid rubber in the construction of tires began in the mid-19th century. The first patent for a successful pneumatic tire was issued in 1888 to Irishman John Dunlop who created an inner-tube for a bicycle tire. This was when the word "pneumatic" appeared to describe tires.
Seven years after, in the year 1895, Andre and Edouard Michelin made pneumatic tires for a car in France. The company of the Michelin brothers was destined to become a leading manufacturer of tires for automobiles. The first company in the US to produce tires was Goodyear Tire company established in 1898, followed by the Firestone Tire & Rubber company in 1900, the second United States company to produce tires.
Function
For the first half of the 20th century, pneumatic tires needed a rubber inner tube in order to hold the air pressure. Tires were constructed of toughened layers of plies or cord covered with rubber. The plies were laid on a bias or angle to strengthen it and to define the shape of the tire. These "bias ply" tires had a tread pattern for traction.
Modern radial tires are constructed with the plies running at 90 degrees across the tire body. They need no inner tube since the tire forms an airtight seal with the wheel. This was an invention of the Michelin company in 1948. The tires did not become widely utilized until the late 1970s. Radial tires offer better fuel economy and last longer.