A surge suppression system for dampening surge pressures or pipe hammer by introducing a gas into a flow conduit in such an amount that the introduced gas is in excess of that required to saturate the liquid. Preferably, the gases are those which are relatively inert or not unduly reactive and which...http://www.google.co.uk/patents/US4045347?utm_source=gb-gplus-sharePatent US4045347 - System for pollution suppression
