Claims:We claim:
1. A fluid transfer device 10, said fluid transfer device 10 comprising:
a first rotor 12 comprising a first blade 14;
a second rotor 16 comprising a second blade 18, said second rotor 16 inserted within said first rotor 12 such that a first chamber is defined between a first side 20 of said first blade 14 and a first side 22 of said second blade 18, and a second chamber is defined between a second side 24 of said first blade 14 and a second side 26 of said second blade 18; and
a stator 28 coupled to said first rotor 12 such that said stator 28 encloses said first rotor 12, said stator 28 facilitates transferring fluid in and out of said fluid transfer device 10.

2. The fluid transfer device 10 in accordance with Claim 1 wherein said stator 28 includes a first opening 30 and a second opening 32 defined at a first portion of said stator 28, said first opening 30 adapted to channel fluid within said first chamber during an expansion of said first chamber, said second opening 32 adapted to channel fluid out of said first chamber at an end of contraction of said first chamber.

3. The fluid transfer device 10 in accordance with Claim 2 wherein said second rotor 16 includes a third opening 34 and a fourth opening 36 defined there through, said third opening 34 adapted to be aligned with said first opening 30 to channel fluid within said first chamber during the expansion of said first chamber, said fourth opening 36 adapted to be aligned with said second opening 32 to channel fluid out of said first chamber at the end of contraction of said first chamber.

4. The fluid transfer device 10 in accordance with Claim 1 wherein said stator 28 includes a fifth opening 38 and a sixth opening 40 defined at a second portion of said stator 28, said fifth opening 38 adapted to channel fluid within said second chamber during an expansion of said second chamber, said sixth opening 40 adapted to channel fluid out of said second chamber at an end of contraction of said second chamber.

5. The fluid transfer device 10 in accordance with Claim 4 wherein said first rotor 12 includes a seventh opening 42 and an eighth opening 44 defined there through, said seventh opening 42 adapted to be aligned with the fifth opening 38 to channel fluid within said second chamber during the expansion of said second chamber, said eighth opening 44 adapted to be aligned with the sixth opening 40 to channel fluid out of said second chamber at the end of contraction of said second chamber.

6. The fluid transfer device 10 in accordance with Claim 1 wherein said second rotor 16 rotates at a faster speed relative to the first rotor 12 to expand a volume of said first chamber when fluid is channeled into said first chamber thereby causing contraction of volume of said second chamber.

7. The fluid transfer device 10 in accordance with Claim 1 wherein said first rotor 12 rotates at a faster speed relative to the second rotor 16 to expand a volume of said second chamber when fluid is transferred into said second chamber thereby causing contraction of volume of said first chamber.

8. The fluid transfer device 10 in accordance with Claim 1 wherein said first rotor 12 and said second rotor 16 are driven by at least one external driving mechanism.

9. The fluid transfer device 10 in accordance with Claim 8 wherein said first rotor 12 and said second rotor 16 are driven by said at least one external driving mechanism through at least one gear mechanism.

10. The fluid transfer device 10 in accordance with Claim 1 wherein said first rotor 12 and said second rotor 16 are each driven at varying speeds. , Description:Field of the invention:
[0001] This disclosure relates to a fluid transfer device.
Background of the invention:
[0002] U.S. Patent Application Number US20070006585A1 describes a method of delivering cool dense intake air to an internal combustion engine intake using a supercharger. The supercharger compresses air for delivery to an intercooler, where air is cooled and allowed to pass to an expansion valve. The pressure and temperature of the air flowing out of the expansion valve reduces further, and hence cool and dense air is delivered to the internal combustion engine.

Brief description of the accompanying drawing:
[0003] An embodiment of the disclosure is described with reference to the following accompanying drawing:
[0004] Figure 1 illustrates an isometric view of a fluid transfer device in accordance with this disclosure.

Detailed description of the embodiments:
[0005] A fluid transfer device 10 is described. The fluid transfer device 10 comprises a first rotor 12 comprising a first blade 14 and a second rotor 16 comprising a second blade 18. The second rotor 16 is inserted within the first rotor 12 such that a first chamber is defined between a first side 20 of the first blade 14 and a first side 22 of the second blade 18, and a second chamber is defined between a second side 24 of the first blade 14 and a second side 26 of the second blade 18. A stator 28 is coupled to the first rotor 12 such that the stator 28 encloses the first rotor 12, the stator 28 facilitates transferring fluid in and out of the fluid transfer device 10.

[0006] Figure 1 illustrates a fluid transfer device 10. The fluid transfer device 10 comprises a stator 28. The stator 28 includes a first opening 30 defined at a first portion of the stator 28. In an embodiment, the first opening 30 is defined about a periphery of the first portion of the stator 28 such that the first opening 30 partially surrounds the first portion of the stator 28. In an alternate embodiment, the first opening 30 is defined intermittently about the periphery of the first portion of the stator 28 such that the first opening 30 partially surrounds the first portion of the stator 28. In another alternate embodiment, the first opening 30 may be a circular opening that is defined in the first portion of the stator 28. The stator 28 includes a second opening 32 defined in the first portion of the stator 28. In an embodiment, the second opening 32 is eccentrically positioned with reference to the first opening 30 that is defined in the first portion of the stator 28. The second opening 32 is defined closer to the center of the first portion of the stator 28. The first opening 30 that is defined about the periphery of the first portion of the stator 28 facilitates channeling fluid in the fluid suction device 10. The second opening 32 that is defined closer to the center of the first portion of the stator 28 facilitates channeling fluid out of the fluid suction device 10. The second opening 32 is offset from the first opening 30 to facilitate channeling fluid out of the fluid suction device 10 before fresh fluid is channeled in the fluid suction device 10 via the first opening 30.

[0007] The fluid transfer device 10 comprises a second rotor 16. The second rotor 16 comprises a circular disc 37 defined therein. The circular disc 37 includes a third opening 34 and a fourth opening 36 that each extend from a first side of the circular disc 37 to an opposite second side of the circular disc 37. The third opening 34 is aligned with the first opening 30 to facilitate channeling fluid in the fluid suction device 10 at specific orientations of the first blade 14 and the second blade 22. The fourth opening 36 is aligned with the second opening 32 to facilitate channeling fluid out of the fluid suction device 10. The second rotor 16 comprises a shaft 46. A first end of the shaft 46 is coupled to the circular disc 37, while an opposite second end of the shaft 46 is coupled to a gear drive that rotates the shaft 46 in accordance with a velocity profile that will be explained in more detail. A second blade 18 is coupled to the shaft 46. An upper edge of the second blade 18 is secured to the circular disc 37, while a side portion of the second blade 18 is secured to the shaft 46.

[0008] The stator 28 includes a fifth opening 38 defined at a second portion of the stator 28. In an embodiment, the fifth opening 38 is defined about a periphery of the second portion of the stator 28 such that the fifth opening 38 partially surrounds the second portion of the stator 28. In an alternate embodiment, the fifth opening 38 may be defined intermittently about the periphery of the second portion of the stator 28 such that the fifth opening 38 partially surrounds the second portion of the stator 28. In another alternate exemplary embodiment, the fifth opening 38 may be a circular opening that is defined in the second portion of the stator 28. The stator 28 includes a sixth opening 40 defined at the second portion of the stator 28. In an embodiment, the sixth opening 40 is eccentrically defined with respect to the fifth opening 38 that is defined in the side portion of the stator 28. The sixth opening 40 is defined closer to the center of the second portion of the stator 28. The fifth opening 38 that is defined about the periphery of the second portion of the stator 28 facilitates channeling fluid in the fluid suction device 10. The sixth opening 40 that is defined closer to the center of the second portion of the stator 28 facilitates channeling fluid out of the fluid suction device 10. The sixth opening 40 is offset from the fifth opening 38 to facilitate channeling fluid out of the fluid suction device 10 before fresh fluid is channeled in the fluid suction device 10 via the fifth opening 38.

[0009] The fluid transfer device 10 comprises a first rotor 12. The first rotor 12 includes a first blade 14. The first blade 14 extends radially from an inner periphery of the first rotor 14 to a center of the first rotor 12. The first rotor 12 includes a seventh opening 42 and an eighth opening 44 that each extend from a first side of the first rotor 12 to an opposite second side of the first rotor 12. The seventh opening 42 is aligned with the fifth opening 38 to facilitate channeling fluid in the fluid suction device 10 at specific orientations of the first blade 14 and the second blade 22. The eighth opening 44 is aligned with the sixth opening 40 to facilitate channeling fluid out of the fluid suction device 10. The first rotor 12 comprises a shaft 48. A first end of the shaft 48 is coupled to the first rotor 12, while an opposite second end of the shaft 48 is coupled to a gear drive that rotates the shaft 48 in accordance with a velocity profile that will be explained in more detail. A lower edge of the first blade 14 is secured to the base of the first rotor 12, while a side portion of the first blade 14 is secured to the side of the first rotor 12. A first chamber is defined between a first side 20 of the first blade 14 and a first side 22 of the second blade 18, and a second chamber is defined between a second side 24 of the first blade 14 and a second side 26 of the second blade 18.

[00010] The working of the fluid transfer device 10 is described as an example. As fluid is channeled to the first opening 30 of the stator 28, the fluid is channeled to the first chamber via the third opening 34 that is defined in the second rotor 16. During this time, the second blade 18 of the second rotor 16 rotates at a faster velocity relative to the first blade 14 of the first rotor 12. This causes the volume of the second chamber to contract. As the second blade 18 approaches the first blade 14, the pressure of fluid in the second chamber increases. When the eighth opening 44 of the first rotor 12 coincides with the sixth opening 40, the pressurized fluid from the second chamber is channeled out of the sixth opening 40 via the eighth opening 44. When the first rotor 12 continues to rotate, the seventh opening 42 coincides with the fifth opening 38. Fresh air is channeled into the second chamber via the seventh opening 42 and the fifth opening 38. During this time, the second blade 18 rotates at a slower velocity relative to the first blade 14. The increased velocity of the first blade 14 causes the second chamber to expand while fresh incoming air is admitted via openings 38 and 42 respectively. The expansion of the second chamber causes the volume of the first chamber to contract. As the first blade 14 approaches the second blade 18, the pressure of fluid in the first chamber increases. When the fourth opening 36 of the second rotor 16 coincides with the second opening 32, the pressurized fluid from the first chamber is channeled out of the second opening 32 via the fourth opening 36.

[00011] As can be seen from above, the first rotor 12 is coupled to a drive that rotates the first rotor 12 at a constant velocity. Further, the second rotor 16 is coupled to a sleeve that is within the first rotor 12. The second rotor 16 is coupled to a drive that rotates the second rotor 16 at a second velocity, wherein the second velocity is a variable velocity depending on the orientation of the inlet and outlet openings of the fluid transfer device 10. In an alternate embodiment, the second rotor 16 is coupled to a drive that rotates the second rotor 16 at a constant velocity, while the first rotor 12 is coupled to a drive that rotates the first rotor 12 at a variable velocity.

[00012] It should be understood that embodiments explained in the description above are only illustrative and do not limit the scope of this invention. Many such embodiments and other modifications and changes in the embodiment explained in the description are envisaged. The scope of the invention is only limited by the scope of the claims.