Patent ID: 7013837

Claim:
A pig pen structure comprising: a walking passage; and a plurality of pig houses for housing an animal installed along the walking passage, each pig house comprising: an evacuation room; a lodging room having front, back, and two side walls; an evacuation room gate installed between the evacuation room and the lodging room, wherein the evacuation room is accessible to the animal for excretion when the evacuation room gate is opened, and further wherein the evacuation room gate when closed becomes a part of the back wall; a urine tube installed on the bottom of the evacuation room, wherein the excreted urine in the evacuation room flows down to the urine tube to remove the excreted urine outside the pig house wherein the plurality of the pig houses are arranged so that the front walls of the pig houses adjoin the walking passage, wherein a continuous passage way is formed by the evacuation rooms along the back wall of the lodging room when the evacuation room gates of the pig houses are in closed position, wherein the front wall of the pig house comprises a plurality of horizontally running elongated materials; and wherein the lower one of the horizontally running elongated materials of the front wall of each pig house form a continuous water pipe for supplying drinking water to the animal.