Rotor adapted to rotate about a rotary shaft
AssigneeNederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzcek Ten Behoeve Van Nijverheid, Handel en Verkeer (Nijverheidsorganisatie T.N.O.)
InventorFrederik H. Leeuwrik
Life of this patent
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Abstract
A rotor adapted to rotate about a rotary shaft and intended for displacing fluids characterized in that the rotor comprises at least two ridges arranged helically around a core part so that a sectional area at right angles to the axis of rotation comprises at least two lobes with intermediate pits, the depth of the pit measured between the core part and a tangential line to the two lobes one on each side of the pit concerned being at least equal to one third of the distance between the core part and the circle described by the point of a lobe furthest remote from the axis of rotation.
Claims6
A rotor having a core part adapted to be rotated about an axis of rotation for displacing fluids, said core part carrying at least three continuous uniformly curved symmetrically-shaped helical ridges defining a continuous three-lobe cross section in radial planes along the length of the core part, said ridges defining three intermediate pits, said ridges blending into the core part to have the innermost portion of the pits coincident with the core part, the depths of each of the pits measured between the core part and a tangential line to two of said lobes, one on each side of the pit concerned, being at least equal to one-third of the distance between the core part and the maximum radius of said ridges, each of the three lobes in each radial section of the rotor being uniformly curved and symmetrical about a radius from the axis of the rotor to the distal point of the lobe and each of the three pits intermediate the lobes being uniformly curved and symmetrical about a radius from the axis of the rotor to the radially innermost part of the pit.
Dependencies are inferred from the claim text.