Six-blade biaxial rotary positive-displacement pump
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United States of America Patent
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Jun 11, 2013
Grant Date -
Apr 19, 2012
app pub date -
Apr 27, 2011
filing date -
Oct 19, 2010
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Abstract
A six-blade biaxial rotary positive-displacement pump includes a casing formed with a suction port and a discharge port, a pair of rotors accommodated in the casing and having rotor shafts rotatably mounted on housings fixed to opposed ends of the casing, respectively. Each rotor is formed with six blades extending radially equiangularly about the rotor shaft. Each blade is formed so as to have a constant thickness in a rotational direction of each rotor. Each blade has an apex and a valley, and a distance between the apex and the valley is set so as to range from three to five times larger than the thickness of each blade.
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