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A centrifugal particle separator includes a first vane assembly and a second vane assembly. The first vane assembly includes a centrally positioned hub, a collar encircling the hub and a plurality of first vanes. Each first vane can have an inner end connected to the hub and an outer end connected

A centrifugal particle separator includes a first vane assembly and a second vane assembly. The first vane assembly includes a centrally positioned hub, a collar encircling the hub and a plurality of first vanes. Each first vane can have an inner end connected to the hub and an outer end connected to the collar, wherein a trailing edge of at least one of the plurality of first vanes can extend past an edge of the collar. The second vane assembly includes a centrally positioned hub, a collar encircling the hub and a plurality of second vanes circumferentially disposed about the hub. Each second vane can have an inner end connected to the hub and an outer end connected to the collar, wherein a leading edge of at least one of the plurality of second vanes can extend past an edge of the collar. When the first and second vane assemblies are secured together, at least one of the plurality of first vanes protrudes into the second vane assembly.

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What is claimed is: 1. A centrifugal particle separator comprising: a first vane assembly including: a centrally positioned hub, a collar encircling the hub and a plurality of first vanes circumferentially disposed about the hub, each first vane having at least one of an inner end connected to the

What is claimed is: 1. A centrifugal particle separator comprising: a first vane assembly including: a centrally positioned hub, a collar encircling the hub and a plurality of first vanes circumferentially disposed about the hub, each first vane having at least one of an inner end connected to the hub and an outer end connected to the collar, wherein a trailing edge of at least one of the plurality of first vanes extends past an edge of the collar; and a second vane assembly including a centrally positioned hub, a collar encircling the hub and a plurality of second vanes circumferentially disposed about the hub, each second vane having at least one of an inner end connected to the hub and an outer end connected to the collar, wherein when said first and second vane assemblies are secured together, said at least one of said plurality of first vanes protrudes into said second vane assembly. 2. The particle separator of claim 1 wherein a leading edge of at least one of the plurality of second vanes extends past an edge of the collar and protrudes into the first vane assembly. 3. The particle separator of claim 1 wherein at least one vane of the first vane assembly and at least one vane of the second vane assembly has a concave surface along which inlet air flows and wherein a degree of concavity of said at least one vane changes along the length of said vane. 4. The particle separator of claim 3 wherein at least one vane of the first vane assembly and at least one vane of the second vane assembly is angled downwardly and laterally about its hub. 5. The particle separator of claim 1 wherein the first vane assembly is secured to the second vane assembly so as to allow the trailing edge of at least one first vane to be masked by the leading edge of at least one second vane. 6. The particle separator of claim 1 wherein the hub of the first vane assembly includes a peripheral skirt which includes at least one slot adjacent an edge for selectively securing the first vane assembly to the second vane assembly. 7. The particle separator of claim 1 wherein the hub of the first vane assembly includes a top wall and a stem depending from the top wall. 8. The particle separator of claim 7 wherein the stem is approximately cruciform in a plan view and includes at least one bore therein. 9. The particle separator of claim 7 wherein the top wall includes at least one depending boss for receiving an associated fastener for selectively securing the first vane assembly to the second vane assembly. 10. The particle separator of claim 1 wherein the hub of the second vane assembly includes a peripheral skirt. 11. The particle separator of claim 10 wherein the peripheral skirt includes at least one radially extending tab for selectively securing the second vane assembly to the first vane assembly. 12. The particle separator of claim 1 wherein the hub of the second vane assembly includes a top wall and a stem depending from the top wall. 13. The particle separator of claim 12 wherein the stem is approximately cruciform in a plan view and includes at least one bore therein. 14. The particle separator of claim 12 wherein the stem includes at least one aperture for receiving an associated fastener for selectively securing the first vane assembly to the second vane assembly. 15. The particle separator of claim 1 wherein the first vane assembly includes a ledge extending radially outward from an edge of the collar. 16. The particle separator of claim 1 wherein the second vane assembly includes a ledge extending radially outward from an edge of the collar. 17. The particle separator of claim 1 further comprising an impeller assembly operatively associated with said first and second vane assemblies. 18. The particle separator of claim 1 wherein the first vane assembly is of one piece and comprises a polymer material and the second vane assembly is of one piece and comprises a polymer material. 19. A centrifugal particle separator comprising: a first vane assembly including: a centrally positioned hub, a collar encircling the hub, and a plurality of first vanes circumferentially disposed about the hub, each first vane having at least one of a radially inner end connected to the hub and a radially outer end connected to the collar, wherein a trailing edge of at least one first vane extends past an edge of the collar; a second vane assembly including: a centrally positioned hub, a collar encircling the hub, and a plurality of second vanes circumferentially disposed about the hub, each second vane having at least one of a radially inner end connected to the hub and a radially outer end connected to the collar, wherein a leading edge of at least one second vane extends past an edge of the collar; and wherein the first vane assembly is selectively secured to the second vane assembly so as to allow the trailing edge of at least one first vane to be masked by the leading edge of at least one second vane. 20. The particle separator of claim 19 wherein the hub of the first vane assembly includes a sidewall. 21. The particle separator of claim 20 wherein the hub of the first vane assembly includes top wall and a depending stem spaced from the sidewall, the stem including an opening extending through at least a portion thereof. 22. The particle separator of claim 19 wherein the hub of at least one of the first vane assembly and the second vane assembly includes at least one slot adjacent an edge for selectively securing the first vane assembly to the second vane assembly. 23. The particle separator of claim 19 wherein the hub of the first vane assembly includes at least one downwardly extending boss for receiving an associated fastener for selectively securing the first vane assembly to the second vane assembly. 24. The particle separator of claim 19 wherein the hub of the second vane assembly includes a sidewall. 25. The particle separator of claim 24 wherein the hub of the second vane assembly includes a top wall and a depending stem spaced from the sidewall including an opening extending therethrough. 26. The particle separator of claim 19 wherein the hub of at least one of the first vane assembly and the second vane assembly includes at least one radially extending tab for selectively securing the second vane assembly to the first vane assembly. 27. The particle separator of claim 19 wherein the hub of the second vane assembly includes at least one aperture for receiving an associated fastener for selectively securing the first vane assembly to the second vane assembly. 28. The particle separator of claim 19 wherein the first vane assembly includes a ledge extending radially outward from an edge of the collar. 29. The particle separator of claim 19 wherein the second vane assembly includes a ledge extending radially outward from an edge of the collar. 30. A centrifugal particle separator comprising: a first vane assembly including: a central portion including a sidewall, a collar encircling the central portion, and a plurality of first vanes circumferentially disposed about the central portion, at least one first vane including a radially inner end connected to the central portion sidewall and a radially outer end connected to an inner sidewall of the collar wherein a trailing edge of at least one of the plurality of first vanes extends past an edge of the collar; a second vane assembly including: a central portion including a sidewall, a collar encircling the central portion, and a plurality of second vanes circumferentially disposed about the hub, at least one second vane including a radially inner end connected to the central portion side wall and a radially outer end connected to an inner sidewall of the collar wherein a leading edge of at least one of the plurality of second vanes extends past an edge of the collar; and fastening means for selectively securing the first vane assembly to the second vane assembly. 31. The particle separator of claim 30 wherein the trailing edge of at least one first vane is masked by the leading edge of at least one second vane. 32. The particle separator of claim 30 wherein the first vane is of one piece and comprises a thermoplastic material. 33. The particle separator of claim 30 wherein the second vane is of one piece and comprises a thermoplastic material. 34. The particle separator of claim 30 wherein a flange extends radially away from the outer periphery of the collar of the first vane assembly. 35. The particle separator of claim 30 wherein a flange extends radially away from the outer periphery of the collar of the second vane assembly.