Multispecies rodent cage

• US 6,341,581 B1
• Filed: 03/07/2000
• Issued: 01/29/2002
• Est. Priority Date: 06/26/1998
• Status: Expired due to Term

• Current Assignee: Lab Products, Inc.
• Original Assignee: Lab Products, Inc.
• Inventors: Gabriel, George S., Campbell, Neil E., Irwin, Lynn, Murray, Dale, Gerringer, Rodney, Park, Chin Soo, Deitrich, Eric A., Sheaffer, John E., Ruggieri, Albert P.
• Primary Examiner(s): Poon, Peter M.
• Assistant Examiner(s): Nguyen, Son T.
• Application Number:
  US09/521,198
• Time in Patent Office: 693 Days
• Field of Search: 119/417, 119/419, 119/454, 119/452, 119/475
• US Class Current: 119/419
• CPC Class Codes: A01K 1/031 Cages for laboratory animals; Cages for measuring metabolism of animals
• CPC Class Codes: B01D 2255/91 NOx-storage component incorporated in the catalyst
• CPC Class Codes: B01D 46/10 Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
• CPC Class Codes: B01D 46/42 Auxiliary equipment or operation thereof
• CPC Class Codes: B01D 53/9409 Nitrogen oxides

Abstract

A rodent cage including a cage bottom having a plurality of integral side walls, a floor and an open top end. A peripheral lip extends continuously around the top end. A pair of recesses are disposed on the peripheral lip. A feeder assembly has a frame and at least one section descending therefrom. The frame has pair of flanges extending therefrom so that when the feeder assembly is disposed in the cage bottom the pair of flanges are mated with the pair of recesses, respectively. A bonnet is dimensioned in size for sealing the top end of the cage bottom. A lock is disposed on the bonnet for preventing rodents housed in the cage from displacing the bonnet from the cage bottom.

Claims

1. A rodent cage, comprising:

a cage bottom having a plurality of integral side walls, a floor and an open top end, and a peripheral lip extending continuously around said top end;

a feeder assembly having a frame and at least one support descending from said frame, said frame having first and second flanges extending therefrom so that when said feeder assembly is disposed in said cage bottom said flanges are supported by only two opposed walls of said walls; and

a bonnet dimensioned and sized for sealing said open top end of said cage bottom being comprised of three elements a top element, a filter element and a filter retainer element; and

wherein said at least one support is dimensioned to support a water bottle in a substantially vertical position relative to said frame;

wherein said filter retainer element has pressing means to secure said filter element in place against the upper surface of said top element;

wherein said top element has a bottom side and a receiving portion formed therein, said feeder assembly further comprising an upwardly extending lip disposed on said frame, wherein said lip is received by said receiving portion thereby preventing the rodents from accessing said at least one support from above;

wherein said cage bottom is constructed of plastic.

2. The rodent cage of claim 1, wherein said floor of said cage bottom has an area of approximately 80 square inches.

3. The rodent cage of claim 1, wherein said frame of said feeder assembly has at least a second support descending from said frame.

4. The rodent cage of claim 1, wherein said at least one support forms a polygon.

5. The rodent cage of claim 1, wherein said feeder assembly is constructed from transparent plastic.

6. The rodent cage of claim 1, wherein said support has an open lower end and further comprising a snap on bottom, said snap on bottom being selectively connected to said lower end of said at least one support.

7. The rodent cage of claim 6, wherein said snap on bottom is a food container.

8. The rodent cage of claim 6, wherein said snap on bottom is a water bottle support.

9. The rodent cage of claim 1, further comprising a water bottle disposed on said at least one support.

10. The rodent cage of claim 9, wherein said water bottle further comprises a main body, said main body having a pair of molded recesses for inserting said water bottle into and removing said water bottle from said at least one support.

11. The rodent cage of claim 10, wherein said main body and said at least one support are substantially the same shape.

12. The rodent cage of claim 1, wherein said top has a surface, said surface being perforated for allowing air to pass to and from said cage bottom.

13. The rodent cage of claim 1, wherein said top has a perimeter and further comprises a vertical portion descending from said perimeter of a surface, and a border horizontally extending from said vertical portion, wherein when said top is placed on said cage bottom, said border contacts said peripheral lip thereby substantially sealing said cage bottom.

14. The rodent cage of claim 13, wherein said cage bottom further comprises a rim vertically descending from said peripheral lip, and said top further comprises a skirt vertically descending from said border, wherein when said top is placed on said cage bottom, said skirt extends around said rim thereby creating a circuitous path for the movement of air from inside said cage bottom to outside said cage bottom.

15. The rodent cage of claim 1, wherein said top element is constructed from stainless steel.

16. The rodent cage of claim 1, wherein said top has a plurality of cross beams and further comprises a filter disposed on said plurality of cross beams for filtering air entering said cage bottom through said top element.

17. The rodent cage of claim 16, wherein said filter retainer element is disposed on said filter, said filter retainer element having a perforated surface for allowing air to pass to and from said cage bottom.

18. The rodent cage of claim 17, wherein said filter retainer has a descending border, said descending border of said filter retainer element having a plurality of windows, said top further comprising a plurality of detents protruding from a rim of said top element, said windows receiving said detents to secure said filter retainer to said top.

19. The rodent cage of claim 17, wherein said filter retainer has a bottom side, a track protrudes from said bottom side of said filter retainer and compresses said filter against said top for securing said filter in place maintaining integrity of filtered air entering into the cage.

20. The rodent cage of claim 1, further comprising a lock for locking said top to said cage bottom.

21. The rodent cage of claim 20, wherein said lock comprises a lock bar, said lock bar rotatable from an unlocked position to a locked position.

22. The rodent cage of claim 21, wherein said lock further comprises a visual alert, wherein when said lock is in said unlocked position said visual alert is visible and when said lock is in said locked position, said visual alert is not visible.

23. The rodent cage of claim 1, wherein said pressing means is comprised of a track protruding from the bottom surface of said filter retainer.

24. A cage level barrier rodent cage, comprising:

a cage bottom having a plurality of integral side walls, a floor and an open top end, and a peripheral lip extending continuously around said open top end;

a feeder assembly having a frame and at least one support descending from said frame, said frame having first and second flanges extending therefrom, said flanges being supported by said cage bottom on a portion of two opposed integral walls; and

,

a bonnet dimensioned and sized for sealing said open top end of said cage bottom, said bonnet including a filter element, said bonnet protecting said filter element without a wire bar lid, said bonnet being comprised of two additional elements a top element and a filter retainer element; and

wherein said at least one support is dimensioned to support a water bottle in a substantially vertical position relative to said frame;

wherein said top element has a bottom side and a receiving portion formed therein, said feeder assembly further comprising an upwardly extending lip disposed on said frame, wherein said lip is received by said receiving portion thereby preventing the rodents from accessing said at least one support from above;

wherein said filter retainer element has pressing means to secure said filter element in place against the upper surface of said top element; and

wherein said cage bottom is constructed of plastic.

25. The cage level barrier level rodent cage of claim 24, wherein said floor of said cage bottom has an area of approximately 80 square inches.

26. The cage level barrier rodent cage of claim 24, further comprising a water bottle disposed in said at least one support.

27. The cage level barrier rodent cage of claim 24, wherein said bonnet includes said top element capable of covering said top end of said cage bottom.

28. The cage level barrier rodent cage of claim 27, wherein said top has a surface, said surface being perforated for allowing air to pass to and from said cage bottom.

29. The cage level barrier rodent cage of claim 28, wherein said top has a perimeter and further comprises a vertical portion descending from said perimeter of said surface, and a border horizontally extending from said vertical portion, wherein when said top is placed on said cage bottom, said border contacts said peripheral lip thereby substantially sealing said cage bottom.

30. The cage level barrier rodent cage of claim 27, further comprising a lock for locking said top to said cage bottom.

31. The rodent cage of claim 24, wherein said pressing means is comprised of a track protruding from the bottom surface of said filter retainer.