Gear pump having fluid deaeration capability

Abstract From the Canadian patent

Abstract of the Disclosure, A gear pump has a pair of intermeshing gears located in a corresponding pair of intersecting cavities in a housing, and air bleed passages are defined in the housing for passing entrained air collected in the fluid at the tooth roots of the gears as a result of centrifugal force away from a preselected region of each of the gear cavities. Preferably, a pair of arcuate air bleed passages are formed in the housing and are located in a trailing portion of the preselected region and a pair of, grooves transmit pressure from a discharge opening back to the tooth roots to positively encourage movement of fluid with entrained air toward the arcuate air bleed passages.