Patent ID: 9470228
Filing Date: 2016-10-18
CPC Classification: F01C,F04C

Claim Text:
1. A lobe pump comprising: a) a housing having an inlet and an outlet and walls, b) a first shaft and a second shaft, the shafts being elongated cylinders, the first shaft extending beyond a wall of the housing such that it is rotated by a motor, the shafts fixed within the housing such that their long axes are parallel, the shafts coupled through use of timing gears affixed to a first end of each shaft such that rotation of the first shaft by the motor causes the second shaft to rotate, c) a plurality of segments, each segment comprising: d) wherein in the plurality of segments, the first lobe rotors attached to the same shaft and in adjacent segments are aligned to be rotationally displaced from one another by an index angle, and the second lobe rotors attached to the same shaft and in adjacent segments are aligned to be rotationally displaced from one another by the index angle, and, e) the pump chamber isolation region arc is equal to the lobe separation angle, and, f) the index angle is equal to the lobe separation angle divided by the number of segments.