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Harbor Freight Tools, commonly referred to as Harbor Freight, is an American privately held tool and equipment retailer, headquartered in Calabasas, California. It operates a chain of retail stores, as well as an e-commerce business. The company employs over 28,000 people in the United States, [5] and has over 1,500 locations in 48 states. [6] [7]
Big Boy, a cement mixer truck, shows viewers how concrete is made and what it is used for. The cement yard receives a load of sand from Red, a Mack hopper semi-truck and a load of gravel from Blue, a Western Star hopper semi-truck who dump their loads into grates, the gravel is taken by a conveyor belt and the different sizes of gravel are ...
The mixer already exhibited the still common basic construction with a tiltable conical drum (as double cone at that time) with blades. On February 9, 1904, the first portable concrete mixer was patented by Richard Bodlaender, an inventor from Breslau, Germany. [2] This concrete mixer was horse-drawn and called 'Mortar Mixer'.
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In 1914 it introduced the Rex brand-name, which was first used on a chain-driven concrete mixer. It soon became a widely recognized trademark. In 1923, C.R. Messinger of Chain Belt Company served as President of the American Foundry Society for a one-year term. In 1941 it won the combined Army and Navy Award for Excellence in War Production. [4]
The volumetric mixer varies in capacity size up to 12 m 3 and has a production rate of around 60m 3 an hour depending on the mix design. Many volumetric concrete mixer manufacturers have innovated the mixer in capacity and design, as well as added features including color, multiple admixes, fiber systems, and the ability to do gunite or shotcrete.
A wet mix concrete plant combines some or all of the above ingredients (including water) at a central location into a concrete mixer - that is, the concrete is mixed at a single point, and then simply agitated on the way to the jobsite to prevent setting (using agitators or ready mix trucks) or hauled to the jobsite in an open-bodied dump truck ...
Trucks are also important to the construction industry, as dump trucks and portable concrete mixers are necessary to move the large amounts of rocks, dirt, concrete, and other construction material. Trucks in America are responsible for the majority of freight movement over land, and are vital tools in the manufacturing, transportation, and ...
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