Patent US3815485A successfully refreshed from Google Patents.
US3815485A
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US
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Method and device for ventilating a space
Assignee: INTEGRA LICHTENVOORDE
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Filing: 1971-11-30
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Granted: 1974-06-11
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Expires: 1991-11-30
Abstract
Abstract A method and device for ventilating a space containing living beings such as animals by supplying a gaseous fluid through a plurality of apertures at a high speed, thereby periodically interrupting the gas supply such that between two successive blowing periods, the gas stream is almost completely coming to a standstill.
Inventors
- 👤 J Beusink
- 👤 B Buesink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:36
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; A; A01; A01K; A01K1/00; A01K1/0047
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
78 words
A method for supplying gas to a space in which are a number of living beings whereby gas under overpressure is introduced from outside into the space, and is directed towards the beings in a pulsing way with a velocity greater than 2 m/sec., and with a frequency ranging from one pulsation per 20 seconds to three pulsations per second, in such a manner that between two successive blowing periods the ejected gas comes almost to a standstill.
Claim 2
Independent Claim
78 words
A method for supplying gas to a space in which are a number of living beings whereby gas under overpressure is introduced from outside into the space, and is directed towards the beings in a pulsing way with a velocity greater than 2 m/sec., and with a frequency ranging from one pulsation per 20 seconds to three pulsations per second, in such a manner that between two successive blowing periods the ejected gas comes almost to a standstill.
Claim 3
Dependent Claim
31 words
A method according to claim 1, wherein the ratio in the length of time of the pulsations and the standstill, ranges from three to one-fourth and preferably from one to one-third.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |