Patent ID: 8961148
Filing Date: 2015-02-24
Classification: F04C

Abstract:
1. A unified variable displacement pump, comprising: a housing; a fluid pump, a portion of said housing being part of said fluid pump; a vacuum pump, a portion of said housing being part of said vacuum pump; an integrated shaft extending through said fluid pump and said vacuum pump, said integrated shaft having a first portion and a second portion; a vacuum pump rotor formed monolithically with said integrated shaft and connected to said first portion and said second portion of said integrated shaft, said first portion extending away from a first side of said vacuum pump rotor, and said second portion extending away from a second side of said vacuum pump rotor; a first lobe formed as part of said vacuum pump rotor; a second lobe formed as part of said vacuum pump rotor in proximity to said first lobe such that first portion of said integrated shaft is connected to said first lobe and said second lobe, and said second portion of said integrated shaft is connected to said first lobe and said second lobe; a fluid pump rotor mounted to said second portion of said integrated shaft such that when said integrated shaft rotates, said vacuum pump rotor and said fluid pump rotor rotate, causing said fluid pump to pump fluid and said vacuum pump to generate a vacuum; a single slot extending through said vacuum pump rotor; and a single vacuum pump vane slidably disposed within said slot, said vacuum pump vane extending entirely through said vacuum pump rotor, thereby crossing a longitudinal axis of said integrated shaft.