Patent ID: 6910444

Claim:
An apparatus for supplying heated liquid feed to multiple drinkers from which animals can drink on a need basis, said apparatus comprising: a plurality of drinkers each having an inlet and an outlet with a normally-closed animal-actuated valve between the inlet and the outlet to direct the liquid feed to the drinker when the valve is actuated by an animal; a reservoir for supplying the liquid feed, the lowest level of the reservoir being at a level above the level of the drinkers; a closed liquid line leading from the reservoir to the drinkers and returning from the drinkers to the reservoir, the portion of the liquid line from the reservoir carrying the liquid feed upwardly and then downwardly to the drinkers while the portion of the liquid line returning from the drinkers to the reservoir carries the liquid feed upwardly from the drinkers and then downwardly to the reservoir, the drinkers being serially connected in the liquid line; a pump operable for moving the liquid feed under pressure through the liquid line and through the drinkers; each drinker having its inlet connected directly to the closed liquid line so that the liquid feed in said line continuously flows under pressure through the inlet and to the animal-actuated valve at all times when the liquid feed is moved through the liquid line by the pump; and one or more heating units of the resistance-heating rope type located in the liquid line downstream from the pump and upstream from one or more drinkers to heat the liquid feed at the plurality of drinkers to a predetermined temperature greater than about 70 degrees Fahrenheit suitable for feeding the animals but at a temperature that will not damage the liquid feed, the pump and the one or more heating units being operatively connected so that no heating unit can be energized unless the pump is operating.