Patent ID: 9458611
Filing Date: 2016-10-04
CPC Classification: E03B,E03C,F24D,Y10T

Claim Text:
1. A method for retaining the temperature of a liquid in a liquid distribution system having at least one liquid conduit extending from a liquid source to a liquid tap, comprising the steps of: evacuating the liquid from the liquid conduit after completion of a tapping operation, by generating a backward pressure gradient in said liquid conduit, causing the liquid to flow backwards towards said liquid source, while letting a gas flow into the liquid conduit and replace the backwardly flowing liquid therein, stopping said backward flow of liquid when the liquid conduit is evacuated, and evacuating the gas from the liquid conduit when liquid is to be tapped again from said liquid tap, by generating a forward pressure gradient in said liquid conduit causing the liquid to flow from said liquid source to said liquid tap, said step of evacuating the gas from the liquid conduit and refilling of liquid in said liquid conduit being performed in three steps: wherein at the end of said second step of refilling the liquid conduit with liquid from said liquid source, the motion of liquid will be dampened, when it approaches said at least one separate gas passage before said liquid passage is opened, by means of a compressible volume of gas communicating with said at least one separate gas passage and accommodating remaining air or gas being pushed in front of the liquid.