Roots blower with improved clearance between rotors
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United States of America Patent
Stats
-
Aug 20, 1991
Grant Date -
N/A
app pub date -
Feb 7, 1990
filing date -
Feb 17, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A Roots blower has two rotors in which each of said rotors, as viewed in plan view thereof in the direction of the rotational axis thereof. The rotor has a center and orthogonal short and long axes and has a final shape of a contour offset from a basic profile curve by an offset distance at every point thereof in the normal line direction thereto. The offset distance is also determined in accordance with a function which assumes a maximum value when the angle between a line connecting the rotor center with the point and either of the short and long axes is 45 degrees, which assumes a minimum value when the line coincides with either of the short and long axes, and the function comprises an exponential power of a sine function.
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Cited Art Landscape
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