On vehicles made after 1969, the speed is normally adjustable, with several continuous speeds, and often one or more intermittent settings. The blade is swung back and forth over the glass, pushing water, other precipitation, or any other impediments to visibility, from its surface. The arm is powered by a motor, often an electric motor, although pneumatic power is also used for some vehicles. Almost all motor vehicles, including cars, trucks, buses, train locomotives, and watercraft with a cabin-and some aircraft-are equipped with one or more such wipers, which are usually a legal requirement.Ī wiper generally consists of a metal arm one end pivots, the other end has a long rubber blade attached to it. ![]() A train windscreen wiper in operation (MRT Jakarta)Ī windscreen wiper, windshield wiper or wiper blade ( American English) is a device used to remove rain, snow, ice, washer fluid, water, or debris from a vehicle's front window.
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