Fluid machinery having a helical mechanism with through holes for ventilation
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United States of America Patent
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-
Jul 8, 2003
Grant Date -
Dec 26, 2002
app pub date -
Jun 25, 2002
filing date -
Jun 25, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A fluid machinery comprises a helical mechanism provided with a cylinder, a roller eccentrically disposed inside the cylinder and formed with a helical groove and a blade member fitted in the helical groove, an electric motor unit connected to the helical mechanism through a rotational shaft, the roller, which eccentrically rotates, having an engagement portion engaged with a crank portion of the rotational shaft, and a pair of bearings disposed to both axial end portions of the cylinder so as to support the rotational shaft. The engagement portion of the roller and the bearings are formed with through holes for ventilation, respectively.
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