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A leaf spring is a simple form of spring commonly used for suspension in wheeled vehicles. Originally called a laminated or carriage spring, and sometimes referred to as a semi-elliptical spring, elliptical spring, or cart spring, it is one of the oldest forms of vehicle suspension. A leaf spring is one or more narrow, arc-shaped, thin plates ...
A torsion bar suspension, also known as a torsion spring suspension, is any vehicle suspension that uses a torsion bar as its main weight-bearing spring. One end of a long metal bar is attached firmly to the vehicle chassis; the opposite end terminates in a lever, the torsion key, mounted perpendicular to the bar, that is attached to a ...
The older spring based systems had performance issues, and an insufficiently well designed and implemented system can be nonfunctional and undrivable. The problem with these spring based systems happens as follows: As the towing vehicle brakes, the trailer travels forward, sliding the mechanism, for a distance before trailer braking begins.
The parking brake is the air operated spring brake type where the brake is applied by spring force in the spring brake cylinder (12) and released by compressed air via a hand-control valve (7). The trailer brake consists of a direct two-line system: the supply line and the separate control or service line.
Pneumatic spring on a semitrailer. Air suspension is used in place of conventional steel springs in heavy vehicle applications such as buses and trucks, and in some passenger cars. It is widely used on semi trailers and trains (primarily passenger trains).
Utility Trailer Manufacturing Company is an American semi-trailer truck dry van, flatbed, and refrigerated van trailer manufacturing company, with its headquarters in the City of Industry, Los Angeles County, California, and sales office in Alpharetta, Georgia and a Parts Distribution Center in Batavia, Ohio.
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