Pump actuated by an electrodynamic transducer and method for making such a pump

摘要

The activating coil (3) and the piston (2) that transmits the mechanical action are coupled together to form a single rigid unit. The coupling is achieved using a part in the shape of a spoked disc (4) made from a synthetic material by injection moulding. Simultaneously the disc is moulded onto the coil former (5) and piston which have been accurately clamped in position within the mould (7).