PURPOSE: To increase the suction and discharge volumes of working fluid, and to provide a lightweight and compact arrangement.
CONSTITUTION: Two congruent cylinder segments 4, 4 are joined together with third axes are parallel with each other so as to form a pump housing 5, and pump shafts 2, 3 which journal impellers 1 are located in the cylinder segments 4, respectively. A cam 7 common to both impellers 1 is located at a position between the both pump shafts 2, 3. In each cylinder segment 4, two parts 8, 9 adjacent to a part 6 for attaching the cam, are opened, and accordingly, one of them serves as a suction port while the other of them serves as a discharge port 9. Further, the adjacent suction ports 8, 8 and the discharge ports 9, 9 are merged into a suction port 13 and a discharge port 14, respectively.
NISHIMURA TAKAAKI
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