Rotor drive mechanism and pump apparatus including the same
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United States of America Patent
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Oct 15, 2013
Grant Date -
Feb 16, 2012
app pub date -
Mar 18, 2010
filing date -
Mar 31, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A rotor drive mechanism 25 is configured to transfer rotation of a driving shaft 38 to an external screw type rotor 22 of a uniaxial eccentric screw pump 23 via a connecting shaft 39, the driving shaft 38 being rotated such that the center thereof is located at a fixed position. The rotor drive mechanism 25 is configured such that: the driving shaft 38 includes an inner space 46 which is open toward the rotor 22; the connecting shaft 39 is inserted in the inner space 46; and a first seal portion 55 seals between an inner peripheral surface of an opening of the driving shaft 38, the opening being open toward the rotor 22, and an outer peripheral surface of the rotor shaft 37 connected to the rotor 22 configured to carry out an eccentric rotational movement.
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