| 摘要 |
This implanted unit doses pharmaceutical fluids into the human- or animal body. The new design includes a known, edge-controlled, valveless axial piston pump (2). The piston (3) is driven (6) under control, in rotation and axial translation. A fluid reservoir (5) is connected to the suction side of the pump. The pump preferably has a ceramic cylinder (4) and piston (3). A refilling connection (7) for the reservoir is re-sealable. The integral rotary drive has a separate control unit (8). Pump, reservoir and drive are coaxial in a cylindrical casing (9). Alternatively the drive is external, a non-contact coupling transmitting rotary motion to the piston. The end face of the cylinder has a cam profile (15). To the piston is attached an eccentric cam follower peg (16) which produces the axial motion.
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