Patent ID: 6029605
Filing Date: 2000-02-29
Classification: A01K

Abstract:
A multiple environment tank including:a land shelf supported between a top and a bottom of the tank at a level from which escape by animals is substantially prevented, the land shelf abutting walls of the tank;a ramp attached to the land shelf and extending from the land shelf toward the bottom of the tank and toward a wall of the tank that is also a first end of the tank;a gap between an end of the ramp and the first end of the tank;the gap being sized to allow passage of animals to and from the land shelf and a lower region beneath the ramp and the land shelf, the lower region being configured to be filled with water up to at least a minimum water level that is substantially equal to a level of the end of the ramp and over the entirety of the bottom of the tank; andan opening in the second end of the tank between the land shelf and the bottom of the tank, the opening being located above the level of the end of the ramp and sized to allow access to the lower region.