| 摘要 |
PCT No. PCT/GB80/00150 Sec. 371 Date May 15, 1981 Sec. 102(e) Date May 15, 1981 PCT Filed Sep. 29, 1980 PCT Pub. No. WO81/00888 PCT Pub. Date Apr. 2, 1981.The pump has a chamber in which a piston reciprocates to pump a liquid. The piston is moved by having secured thereto the armature of at least one electromagnet (preferably two). The coil of the electromagnet is suitably external of the pump casing. A control circuit pulses the electromagnet at a predetermined rate to provide a predetermined periodic output. In a preferred form, the pump is mounted together with a liquid reservoir on a printed circuit board, and the unit is encapsulated for implantation in the human body to infuse a liquid medicine at a controlled rate into the bloodstream. |
