Patent ID: 7036457

Claim:
A rodent housing rack that comprises: a rack comprising multiple levels of shelves in which a plurality of cages are arranged and stored, and where the multiple levels of shelves are formed from shelf panels; cages that are box-shaped containers having a rectangular-shaped opening that opens up the entire top surface; and an exhaust chamber located on the rear surface of said shelves and that connects all of the shelves; wherein negative pressure occurs inside said shelves and causes air to flow in one-way from the front of the shelves toward the rear; wherein the space between said opening surface on the top of said cage and the bottom surface of the shelf panel above it is closed off by hanger partitions that close off the top on the left and right sides of said opening surface on the top of said cage and a back panel that comes in contact with the rear of said cage, such that only the front side of the space is open; and wherein exhaust vents are formed in said back panel such that the space above the cage is connected to said exhaust chamber through the vents.