| 摘要 |
PROBLEM TO BE SOLVED: To provide a multiple-purpose piston or a diaphragm type pump capable of switching a flowing direction of fluid by an operation defective due to foreign matter mixing in fluid and reversible rotation of a rotary shaft by adopting a rotary switching valve as an intake/discharge fluid valve to widely cope with serial multiple cylinder enabling a purpose of miniaturization and various kinds of fluid by a self-support type.SOLUTION: A reciprocating motion of the piston 14 is performed since driving torque is passed through a connection shaft 12 by a bearing holder 11 from a cam follower 10 moved by a cam groove 8 of a cam block 7 mounted on the rotary shaft 4 driven by a power source. At the same time as the reciprocating motion, operations of supply and discharge of fluid are performed according to rotating directions at each of a fluid A flow passage connection port 25 and a fluid B flow passage connection port 26 by synchronizing with the movement of the piston 14 on a rotary valve stator 19 side by a rotary valve rotor 20 rotating together with the rotary shaft 4. |
