US4056048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency ventilation means for confined livestock areas
Assignee: Individual
•
Filing: 1976-07-19
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Granted: 1977-11-01
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Expires: 1996-07-19
Abstract
Abstract An emergency ventilation means for confined livestock areas comprised of a plurality of louvered openings which are normally closed by means of electrical motors having a high gearing ratio. When power is lost to the confined livestock area a spring on each set of louvers which is loaded by the electrical motor moving the louver mechanism so as to hold the louvers in a normally closed position causes the louvers to move to an open position so that emergency ventilation will flow through the confined livestock area until power to the normal ventilation means is restored.
Inventors
- 👤 Robert W. Milroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:26
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0064; F; F24; F24F; F24F11/00; F24F11/0001
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
91 words
An emergency ventilation means for confined livestock areas comprised of a set of louvers fastened together in moving relation to each other, an electrical motor having a high gearing ratio, an arm connected to the louvers, a strip connecting the arm to the electrical motor, a spring loading between the strip and a frame for the louvers to immediately open the louvers when electrical power is lost, the electrical motor having a stop thereon to prevent the electrical motor from distorting the louvers as the louvers reach a normally closed position.
Claim 2
Dependent Claim
91 words
An emergency ventilation means for confined livestock areas comprised of a set of louvers fastened together in moving relation to each other, an electrical motor having a high gearing ratio, an arm connected to the louvers, a strip connecting the arm to the electrical motor, a spring loading between the strip and a frame for the louvers to immediately open the louvers when electrical power is lost, the electrical motor having a stop thereon to prevent the electrical motor from distorting the louvers as the louvers reach a normally closed position.
Claim 3
Dependent Claim
51 words
A plurality of the emergency ventilation means of claim 1 used in connection with a confined livestock area having a plurality of ventilation means designed to run from electrical power, the electrical power source for the ventilation means being the same as the electrical power source for the emergency ventilation means.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-31 | 1981-05-02 | 1981-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-31 | 1985-05-02 | 1985-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-31 | 1989-05-02 | 1989-11-01 | $7700.00 | Window Closed / Lapsed |