| US 7,467,935 B2 | ||
| Low input torque rotor for vane pump | ||
| Michael A Betz, Huxley, Iowa (US); Eric D Bretey, Rowan, Iowa (US); Robert J Klinkel, Ames, Iowa (US); and Kevin J Landhuis, Ankeny, Iowa (US) | ||
| Assigned to Sauer-Danfoss, Inc., Ames, Iowa (US) | ||
| Filed on Sep. 17, 2004, as Appl. No. 10/944,031. | ||
| Prior Publication US 2006/0073031 A1, Apr. 06, 2006 | ||
| Int. Cl. F03C 4/00 (2006.01); F04C 18/00 (2006.01) | ||
| U.S. Cl. 418—259 [418/151; 418/152; 418/178] | 3 Claims |
| 1. A vane-type fluid displacement unit comprising:
a housing;
a drive shaft extending through the housing;
a rotor secured to the drive shaft and disposed within the housing, the rotor having at least one non-smooth top or bottom
surface; and
a plurality of vanes secured within a plurality of slots of the rotor; and wherein the top and bottom surfaces of the rotor
have a plurality of dimples evenly spaced across the entire top and bottom surfaces of the rotor.
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