| 摘要 |
A dispensing pump 1 comprising a motor 30, a driveshaft 2 rotatable by the motor in both a first direction of rotation A and a second direction B, a first membrane pump 3 comprising a first operating plunger 4 mounted to the driveshaft by a first coupling 5, and a second membrane pump 6 comprising a second operating plunger 7 mounted to the driveshaft by a second coupling 8, in which first and second coupling each comprise a cam body (fig. 3; 9)which converts rotational movement of driveshaft into reciprocal movement of first and second operating plungers respectively, in which first and second coupling each comprise a clutch bearing (fig 3; 10) which is only engaged by rotation of the driveshaft in first and second directions respectively. The pumps may be mounted on the same or parallel planes and maybe connected to each other. The motor, driveshaft and pump arrangement may also be repeated. |
