Patent ID: 9091265
Filing Date: 2015-07-28
Classification: F04C

Abstract:
1. A gear pump having continuous variable output flow rate, the gear pump comprising: at least one first gear mounted on a first shaft; at least one second gear mounted on a second shaft, the first gear and the second gear being axially movable against each other, wherein the first gear is sealed at one end by a first seal of the first gear and at a second end by a second seal of the first gear, wherein the first and second seals of the first gear are disposed on the first shaft, wherein the second gear is sealed at a first end by a first seal of the second gear and at second end by a second seal of the second gear, and wherein the first and second seals of the second gear are disposed on the second shaft; the first gear comprising a first ring having flow passages or a first plurality of segments having flow passages, the first ring or the first plurality of segments disposed tightly co-axially on the first gear, the second gear comprising a second ring having flow passages or a second plurality of segments having flow passages, the second ring or the second plurality of segments disposed tightly co-axially on the second gear, wherein the first ring or the first plurality of segments is movable with the second gear and the second ring or the second plurality of segments is movable with the first gear.