Gear Pumps

“A Gear pump uses the meshing of gears to pump fluid by displacement. They are one of the most common types of pumps for hydraulic fluid power applications. Gear pumps however are also widely used in chemical installations to pump fluid with a certain viscosity. There are two main variations; external gear pumps which use two external spur gears, and internal gear pumps which use an external and an internal spur gear. Gear pumps are fixed displacement, meaning they pump a constant amount of fluid for each revolution. Some gear pumps are designed to function as either a motor or pump.” (Wikipedia, Gear Pumps, 1/13/2011)

Recent US Patents

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Recent US Patents

10/5/2010
7,806,673
Gear pump
Muscarella and Pascoe of Pulsafeeder, New York have developed a nonmetallic gear pump with a gear pump with a replaceable precision liner that surrounds the gear flights to maintain a tight tolerance for optimal performance of the pump. (RDC 12/19/2010)

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