Wind-up precision pump for portable microfluidics

Herein, a wind-up precision pump is proposed in which the pump is powered by the manual winding of a helical spring, similar to that in a mechanical watch. The unwinding of the wound helical spring provides a constant torque. The connecting gears at the spring convert the rotational movement of the spring into linear motion to generate a constant force for pushing a syringe. Incorporating the high-precision mechanism of a mechanical watch into...