US4085705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Animal cage
Assignee: HARFORD SYSTEMS Inc ABERDEEN MD A CORP OF
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Filing: 1976-09-17
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Granted: 1978-04-25
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Expires: 1996-09-17
Abstract
Abstract A ventilated animal cage system is provided in which a plurality of animal cages are removably suspended on shelves of a portable rack. Each shelf is hollow to form an air duct that is in communication with the cages suspended therefrom, thus minimizing the possibility of cross-contamination between animals in the cages and personnel in the laboratory room.
Inventors
- 👤 Thomas M. Gland
- 👤 Robert C. A. Frederickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:47
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/02; A01K1/03; A01K1/031; A01K1/0313
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
101 words
A portable animal cage rack having a plurality of shelves with each shelf supporting a plurality of animal cages which are removably suspended on the shelf's underneath side, a main air duct mounted on one end of the shelves, a branch air duct in each shelf connected to said main air duct, an opening in said main air duct or one of said branch air ducts adapted for connection to an exhaust system, and an exhaust opening in each said branch air duct directly over a supported animal cage for transmitting air from an animal cage into said branch air duct.
Claim 2
Dependent Claim
101 words
A portable animal cage rack having a plurality of shelves with each shelf supporting a plurality of animal cages which are removably suspended on the shelf's underneath side, a main air duct mounted on one end of the shelves, a branch air duct in each shelf connected to said main air duct, an opening in said main air duct or one of said branch air ducts adapted for connection to an exhaust system, and an exhaust opening in each said branch air duct directly over a supported animal cage for transmitting air from an animal cage into said branch air duct.
Claim 3
Dependent Claim
29 words
The improvement in an animal cage rack in accordance with claim 1 in which each said branch air duct is formed by spaced walls which form the rack shelves.
Claim 4
Dependent Claim
30 words
The improvement in an animal cage rack in accordance with claim 2 in which said main air duct has an extension duct in air-tight connection with a shelf branch duct.
Claim 5
Dependent Claim
23 words
The improvement in an animal cage rack in accordance with claim 3 in which each extension has a baffle for adjusting air flow.
Claim 6
Dependent Claim
23 words
The improvement in an animal cage rack in accordance with claim 4 in which said animal cage has a bottom wall with perforations.
Claim 7
Dependent Claim
31 words
The improvement in an animal cage rack in accordance with claim 5 in which each said shelf has a cleaning fluid opening at its distant end opposite said main air duct.
Claim 8
Dependent Claim
30 words
The improvement in an animal cage rack in accordance with claim 6 in which said main air duct has a cleaning fluid trap opening below the lowest branch air duct.
References Cited (Backward Citations)
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Cited
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Cited
GB462557A
Cited
US2335173A
Cited
US2702503A
Cited
GB1308817A
Cited
US3830200A
Cited
US3919978A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-04-24 | 1981-10-24 | 1982-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-04-24 | 1985-10-24 | 1986-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-04-24 | 1989-10-24 | 1990-04-25 | $7700.00 | Window Closed / Lapsed |