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One more type of Boom Truck is known as a Bucket Truck. It has a bucket accessory together with an expandable arm and specializes in hoisting individuals, typically workers up in the air. Bucket Trucks are also referred to as Aerial Boom Trucks. They have a lifting capacity of 150 kg to 700 kg and the bucket itself can be lengthened up to 10 meters in the air.
Knuckle Boom Trucks are much larger lift vehicles that are outfitted along with a crane on the back of the machinery. If the length of the vehicle is lengthened, then the truck becomes a Trolley Boom Truck. These kinds of trucks have a lifting capacity of ten tons to fifty tons.
A Concrete Boom Truck is yet another kind of Boom Truck which has a big container on its back that is made to carry expandable pipe and concrete. Concrete is pumped with the pipe into a specific site. Concrete Boom Trucks could be lengthened up to 70 meters.
The fluid coupling unit is the most popular kind of torque converter used in car transmissions. During the 1920's there were pendulum-based torque or Constantinesco converter. There are various mechanical designs for constantly changeable transmissions which can multiply torque. For example, the Variomatic is a version which 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 extra component which is the stator. This changes the drive's characteristics during occasions of high slippage and produces an increase in torque output.
There are a minimum of three rotating parts within a torque converter: the turbine, that drives the load, the impeller, which is mechanically driven by the prime mover and the stator, which is between the turbine and the impeller so that it could change 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 condition and this is where the term stator starts from. In 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.
