US3741102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilator
Assignee: CTB Inc
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Filing: 1970-09-28
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Granted: 1973-06-26
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Expires: 1990-09-28
Abstract
Abstract A unit for ventilating an enclosure such as a poultry or livestock house is disclosed and claimed herein and includes a rectangular frame mountable within a framed opening in a wall of the enclosure for defining an air inlet opening. Negative pressure is created within the enclosure by suitable exhaust fans mounted therein and causes the flow of fresh air to pass through the inlet opening. The direction of this fresh air is controlled by a plurality of elongated adjustable louvers mounted to the frame, while a sliding door assembly independently controls the amount of air which passes through the inlet opening.
Inventors
- 👤 S Kaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:57
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0064
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
141 words
A ventilator comprising: frame means mountable within an opening in a building wall for defining an air inlet opening; a plurality of spaced apart elongated louvers, each of which is mounted to said frame means for rotation substantially about its longitudinal axis; interlocking means connected to said louvers for requiring said louvers to rotate in unison; and locking means connected to said frame means for locking said louvers in any one of a plurality of fixed positions; said locking means including at least one L-shaped locking pin having leg portions disposed perpendicularly to one another, a first leg portion being slidably mounted to said frame means, and said second leg portion extending inwardly of said frame means for engagement with said interlocking means to thereby fix said louvers in one of a plurality of pre-designated positions relative to said frame means.
Claim 2
Dependent Claim
141 words
A ventilator comprising: frame means mountable within an opening in a building wall for defining an air inlet opening; a plurality of spaced apart elongated louvers, each of which is mounted to said frame means for rotation substantially about its longitudinal axis; interlocking means connected to said louvers for requiring said louvers to rotate in unison; and locking means connected to said frame means for locking said louvers in any one of a plurality of fixed positions; said locking means including at least one L-shaped locking pin having leg portions disposed perpendicularly to one another, a first leg portion being slidably mounted to said frame means, and said second leg portion extending inwardly of said frame means for engagement with said interlocking means to thereby fix said louvers in one of a plurality of pre-designated positions relative to said frame means.
Claim 3
Dependent Claim
22 words
A ventilator according to claim 1 wherein said second leg portion is extended to permit manual manipulation of said L-shaped locking pin.
Claim 4
Dependent Claim
36 words
A ventilator according to claim 1 including biasing means engaging said frame means and said first leg of said locking pin for biasing said second leg of said locking pin into engagement with said locking means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |