Patent ID: 6336425
Filing Date: 2002-01-08
Classification: A01K,B01D

Abstract:
A bonnet, in combination with a feeder assembly and a cage bottom, for covering a cage bottom used to house rodents, said bonnet comprising:a top for covering a top end of said cage bottom, said top having a perforated surface, a perimeter, a rim descending from said perimeter and a plurality of cross beams extending above the perforated surface; a filter disposed on said cross beams spaced from said perforations for filtering air entering said cage bottom, said top protecting said filter; a filter retainer disposed on said filter; a border horizontally extending from said rim adapted to substantially seal said cage bottom; and a feeder assembly disposed in said cage bottom, said feeder assembly having a frame with an upwardly extending lip disposed thereon, wherein a top portion has a bottom side and a receiving portion on said bottom side opposite said plurality of cross beams, wherein when said top is placed on said cage bottom, said lip is received by said receiving portion thereby preventing said rodents from accessing said feeder assembly from above. wherein said top has a surface, said surface being perforated for allowing air to pass to and from said cage bottom; wherein said top has a receiver portion capable of matingly engaging with a cage bottom feeder assembly; and wherein said perforated surface includes passages which are radiused.