Patent ID: 8936445
Filing Date: 2015-01-20
Classification: F01C,F04C

Abstract:
1. A fluid pump comprising: a housing that includes a base surface and defines a suction chamber, a discharge chamber, and a barrier extending from and arranged perpendicular to the base surface and having a first height relative to the base surface, wherein the barrier is configured to separate the suction chamber from the discharge chamber; and first and second gears rotatably disposed in the housing, configured to mesh and draw relatively low-pressure fluid from the suction chamber, transform the relatively low-pressure fluid into relatively high-pressure fluid, and release the relatively high-pressure fluid into the discharge chamber; wherein the barrier includes first and second portions configured to accept the first and second gears respectively, and a bridge connecting the first and second portions, the bridge being disposed proximately to where the first and second gears mesh; wherein the bridge includes a ramp configured as a plane surface sloped relative to the base surface to provide a gradual transition from the first height to a second height such that height of the bridge is reduced relative to the base surface; and wherein the ramp generates a gradual re-expansion of the fluid away from the bridge and thereby reduces pump noise.