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Referred to as the Bucket Truck, this vehicle has a bucket accessory with an expandable arm utilized to raise workers high up into the air. Bucket Trucks are also called Aerial Boom Trucks. They have a lifting capacity of 150 kg to 700 kg and the bucket itself could be expanded up to 10 meters in the air.
Knuckle Boom Trucks are larger boom trucks which are equipped with a crane on the rear part of the apparatus. If the length of the truck is expanded, the truck then becomes a Trolley Boom Truck. These kinds of trucks have a lifting capacity of 10 tons to 50 tons.
Another kind of Boom Truck the Concrete Boom Truck that is a big container on its rear. These are constructed to carry concrete and to carry expandable pipe. Concrete is pumped with the pipe into a specific location. Concrete Boom Trucks are able to be extended up to 70 meters.
The fluid coupling kind is the most popular type of torque converter used in auto transmissions. During the 1920's there were pendulum-based torque or likewise called Constantinesco converter. There are various mechanical designs used for constantly variable transmissions that have the ability to multiply torque. Like for example, the Variomatic is one version that has expanding pulleys and a belt drive.
A fluid coupling is a 2 element drive which could not multiply torque. A torque converter has an additional part which is the stator. This alters the drive's characteristics throughout times of high slippage and generates an increase in torque output.
There are a at least three rotating parts in a torque converter: the turbine, that drives the load, the impeller, which is mechanically driven by the prime mover and the stator, that is between the impeller and the turbine so that it could alter oil flow returning from the turbine to the impeller. Usually, the design of the torque converter dictates that the stator be stopped from rotating under whatever situation and this is where the word stator begins from. In point of fact, the stator is mounted on an overrunning clutch. This particular design prevents the stator from counter rotating with respect to the prime mover while still allowing forward rotation.
