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US 9,068,568 B2Granted
Inlet cutbacks for high speed gear pump
AssigneeHamilton Sundstrand Corporation
InventorsSteven A. Heitz, Weishun Ni
Life of this patent
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Abstract
A gear pump comprises first and second gears and a housing. The housing comprises a first arcuate gear bore that receives the first gear, a second arcuate gear bore that receives the second gear, a discharge port that joins the first and second arcuate gear bores, an inlet port that joins the first and second arcuate gear bores opposite the discharge port; and first and second cutbacks that are joined to the first and second arcuate gear bores, respectively, adjacent the inlet port.
Claims14
A gear pump comprising:
- first and second gears;
- and
- a housing that includes:
- a first generally circular wall defining a first arcuate gear bore for receiving the first gear, the first arcuate gear bore defining a first fluid path;
- a second generally circular wall defining a second arcuate gear bore for receiving the second gear, the second arcuate gear bore defining a second fluid path;
- a wall defining a discharge port in fluid communication with the first and second fluid paths;
- a wall defining an inlet port generally opposite the discharge port and in fluid communication with the first and second fluid paths;
- a first cutback region defined by a ramp and two sidewalls extending between the inlet port and the first circular wall;
- and
- a second cutback region defined by a ramp and two sidewalls extending between the inlet port and the second circular wall, wherein the first and second cutback regions have widths that are narrower than a width of the inlet port.
7 more elements
A gear pump housing comprising:
- first and second circular walls defining:
- a first arcuate gear bore for receiving a first gear;
- a second arcuate gear bore for receiving a second gear;
- and
- an inlet cusp disposed in a region near where the first and second circular walls intersect;
- a wall defining an inlet port that extends to the inlet cusp;
- an inlet pad comprising a planar surface extending from the first circular wall to the second circular wall at the inlet cusp, wherein the inlet pad is configured to allow fluid to flow from the inlet port to the first and second gears;
- and
- a first cutback region defined by a ramp and two sidewalls extending between the inlet port and the first circular wall;
- and
- a second cutback region defined by a ramp and two sidewalls extending between the inlet port and the second circular wall, wherein the first and second cutback regions have widths that are narrower than a width of the inlet port.
8 more elements
Dependencies are inferred from the claim text.