Patent US4399738A successfully refreshed from Google Patents.
US4399738A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilating structure for greenhouse
Assignee: Individual
•
Filing: 1980-12-29
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Granted: 1983-08-23
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Expires: 2000-12-29
Abstract
Abstract This invention relates to an improvement in the ventilation of a greenhouse and it consists of an elongated tubular inflatable member mounted to underlie an air vent extending along the ridge portion of the greenhouse and a second vent consisting of an elongated opening in the side wall of the greenhouse, each of the vents having an inflatable tubular member carried adjacent thereto whereby the inflatable members in deflatable condition permit the circulation of outside air from the side vent through the ridge vent and an air pump having a line running to each of the inflatable members inflating the same to seal the vents.
Inventors
- 👤 Arlis F. Sharkey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:47
CPC Classifications
A; A01; A01G; A01G9/00; A01G9/24; A01G9/241; A01G9/242; Y; Y02; Y02A; Y02A40/00; Y02A40/10; Y02A40/25
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
Inflatable air vent regulating means for a greenhouse, having in combination a greenhouse structure convex in cross section having a ridge portion and side wall portions, an air vent open to the atmosphere formed in said ridge portion, an inflatable substantially tubular member having closed ends and being coextensive with said vent, means mounting said tubular member adjacent said vent, a pressurized air supply, an air line running from said air supply to said tubular member to inflate the same, a plate member depends inwardly of said greenhouse from each side of said vent and adjacent each side of said tubular member, whereby said tubular member in inflated condition engages and seals against said plate members.
Claim 2
Dependent Claim
116 words
Inflatable air vent regulating means for a greenhouse, having in combination a greenhouse structure convex in cross section having a ridge portion and side wall portions, an air vent open to the atmosphere formed in said ridge portion, an inflatable substantially tubular member having closed ends and being coextensive with said vent, means mounting said tubular member adjacent said vent, a pressurized air supply, an air line running from said air supply to said tubular member to inflate the same, a plate member depends inwardly of said greenhouse from each side of said vent and adjacent each side of said tubular member, whereby said tubular member in inflated condition engages and seals against said plate members.
Claim 3
Dependent Claim
16 words
The structure of claim 1, wherein said means comprises a unitary member coextensive with said vent.
Claim 4
Dependent Claim
22 words
The structure of claim 1, wherein said means comprises a cable substantially centrally longitudinally of said vent extending through said tubular member.
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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) | 1986-08-22 | 1987-02-21 | 1987-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-08-22 | 1991-02-21 | 1991-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-08-22 | 1995-02-21 | 1995-08-23 | $7700.00 | Window Closed / Lapsed |