| 摘要 |
A pump primarily for liquid paint comprising first and second pistons (19, 2 1) reciprocable rectilinearly in respective first and second cylinders (17, 18) , said first and second pistons being moved relative to their respective pisto ns by operation of an A. C. electric motor (13) the rotary output shaft of whic h is coupled to said first and second pistons by means including a constant velocity cam (31) and cam follower (32, 33) mechanism converting rotary moti on of the output shaft into reciprocatory motion of said first and second pisto ns 180~ out of phase with one another. |
