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A wooden hopper for grain, on a millstone. Materials can be added either manually or automatically to the top of a hopper. For dust collection, it enters the hopper from a collection device. For example, baghouses are shaken or blown with compressed air to release caked-on dust from the bag. Precipitators use a rapping system to release the dirt.
A hopper car (NAm) or hopper wagon (UIC) is a type of railroad freight car that has opening doors on the underside or on the sides to discharge its cargo. They are used to transport loose solid bulk commodities such as coal , ore , grain , and track ballast .
A hopper barge is a type of barge commonly designed to transport commodities like coal, steel, rocks, sand, soil and waste. [1] 'Hopper barge' can also refer to a barge that dumps cargo at sea. These are now commonly called 'split hopper barge', because they split along the length of the hull. Split hopper barges can be non-propelled or self ...
A trailing suction hopper dredger [1] (TSHD) is a type of ship capable of maintaining navigable waterways, deepening the maritime canals that are threatened to become silted, constructing new land elsewhere or replacing sand eroded by storms or wave action on the beaches. This is made possible by large, powerful pumps and engines able to suck ...
A rotary car dumper or wagon tippler (UK) is a mechanism used for unloading certain railroad cars such as hopper cars, gondolas or mine cars (tipplers, UK). It holds the rail car to a section of track and then rotates the track and car together to dump out the contents. Used with gondola cars, it is making open hopper cars obsolete.
Hopper cooling is a simple form of water cooling used for small stationary engines. The defining feature of hopper cooling, amongst other water-cooled engines, is that there is no radiator . Cooling water is heated by the engine and evaporates from the surface of the hopper as steam .
Grain hopper trailer. A grain hopper trailer is a trailer pulled by a semi tractor and used to haul bulk commodity products, such as grain.These trailers are used extensively throughout the United States to transport agricultural products as well as any other commodity that can be hauled in bulk and loaded and unloaded through the trailer.
The hopper can be hydraulically lowered and raised. When the hopper is lowered, the front edge cuts into the soil or clay like a plane and fills the hopper. When the hopper is full (8 to 34 m 3 or 10 to 44 cu yd heaped, depending on type) it is raised, and closed with a vertical blade (known as the apron). The scraper can transport its load to ...