A family of Coil Pumps has been developed at Loughborough University
over the last 10 years by the author. The coil pump, sometimes known as
the 'hydrostatic pump', was known and used in the 18th and 19th
centuries, since then it appears to have been forgotten. Laboratory
investigations lead to a theory for predicting the behaviour of this little
known pump The theory is based on an assessment of the boundary levels
of the liquid plugs within the loops. From this work, two types of suction
pump were derived and the lift pump theory was developed and adapted to
predict their behaviour.
One suction pump was based on one helical coil and it required a regulated
air supply. The second pump used two helical coils 'back to back' one
taking water into the pump and the other (of larger capacity) withdrawing
Laboratory tests were carried out on a number of versions of both suction
pumps and the experimental results agreed well with those produced by the theory.
Practical applications of this family of pumps included a low cost stream
powered lift pump, a dosing pump, a sewage suction pump and a sewage
A Doctoral Thesis. Submitted in partial fulfilment of the requirements for the award of Doctor of Philosophy of Loughborough University.