Excavator. Sunday , April 29th , 2018 - 10:29:30 AM
Bobcat Company is an American-based manufacturer of farm and construction equipment part of Doosan Group of South Korea. Its American headquarters is in West Fargo North Dakota USA formerly in Gwinner North Dakota. Its European headquarters moved in 2017 from Waterloo Belgium to Dobris (near Prague) in Czech Republic where Bobcat operates one of its European manufacturing plants. It was a subsidiary of the Ingersoll Rand Company from 1995 until July 2007 when it was sold for US$4.9 billion to Doosan Infracore.1 The company sells skid steer loaders compact excavators compact utility vehicles compact tractors and other small hydraulic equipment under the Bobcat brand name. It is one of the few major manufacturing companies operating in North Dakota.
In the 1950s Louis and Cyril Keller operated Keller Welding and Repair near Rothsay Minnesota. In 1956 Eddie Velo a turkey farmer in the area described to the Kellers a need for a machine small enough to maneuver inside a pole barn and light enough to operate on its upper level. The brothers developed a small three-wheeled design with a belt-driven transmission and delivered it to Velo on February 4 1957.3 Velo allowed the Kellers full access to his operations and after the Kellers learned of drawbacks with the belt-driven transmission they developed and patented a more robust clutch-based transmission system in 1958. The new transmission became the basis of the Melroe M60 loader.
The two main sections of an excavator are the undercarriage and the house. The undercarriage includes the blade (if fitted) tracks track frame and final drives which have a hydraulic motor and gearing providing the drive to the individual tracks and the house includes the operator cab counterweight engine fuel and hydraulic oil tanks. The house attaches to the undercarriage by way of a center pin. High pressure oil is supplied to the tracks hydraulic motors through a hydraulic swivel at the axis of the pin allowing the machine to slew 360° unhindered.
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