Patent US2349881A successfully refreshed from Google Patents.
US3706271A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inlet control
Assignee: Individual
•
Filing: 1971-02-12
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Granted: 1972-12-19
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Expires: 1991-02-12
Abstract
Abstract As auxiliary in a ventilating system, a control unit mountable against an air inlet contains a sloping face and means to adjust the face to control a throat for air flow at given pressure differentials of inside and outside air.
Inventors
- 👤 Robert W Mieczkowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 21:32
CPC Classifications
A; A01; A01K; A01K31/00; A01K1/00; A01K1/0047; A01K1/0064; F; F24; F24F; F24F13/00; F24F13/08; F24F13/10; F24F13/14; F24F13/1426; F24F7/00; F24F2013/1433; F24F2013/1453
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
105 words
An air inlet control unit, adapted for auxiliary control in a ventilating system having means to expel air from an enclosed space, the unit being an enclosure having an open face adapted for mounting against a perimeter air inlet, having a closed face, and having a movable face member and hinge means at top and bottom edges of the movable member to swing the member to various open and closed positions to form a throat with respect to one of the faces to afford an opening from the air inlet, and control means to swing the movable face to various throat-forming upper or lower positions.
Claim 2
Dependent Claim
105 words
An air inlet control unit, adapted for auxiliary control in a ventilating system having means to expel air from an enclosed space, the unit being an enclosure having an open face adapted for mounting against a perimeter air inlet, having a closed face, and having a movable face member and hinge means at top and bottom edges of the movable member to swing the member to various open and closed positions to form a throat with respect to one of the faces to afford an opening from the air inlet, and control means to swing the movable face to various throat-forming upper or lower positions.
Claim 3
Dependent Claim
47 words
An air inlet control unit as set forth in claim 1, the means to swing the throat-forming face comprising a pull element mounted on the unit and adapted to connect to similar elements of neighboring units to form a control line through a series of the units.
Claim 4
Dependent Claim
33 words
An air inlet control unit as set forth in claim 2, in which the pull element is a channel bar adapted for slidable fit with a similar channel bar of a neighboring unit.
Claim 5
Dependent Claim
46 words
An air inlet control unit as set forth in claim 2 in which the means to swing the throat-forming face comprises motor means connected to a rigid positioning element and control means therefor responsive to static air pressure differentials betwEen inside and outside the ventilated space.
Claim 6
Dependent Claim
32 words
An air inlet control unit as set forth in claim 1 in which the control means is responsive to air pressure differentials of the order of 0.01 to 0.20 inches of water.
Claim 7
Dependent Claim
67 words
An air inlet control unit as set forth in claim 1 in which the open face is adapted to mount against a side wall air inlet and the movable face member has hinged connection at its upper edge, to form a throat adjacent the side wall below the air inlet, and means to adjust the movable face member and throat to various throat openings at various positions.
Claim 8
Dependent Claim
67 words
A process of ventilating an enclosed space comprising expelling air therefrom, thereby causing a static pressure difference between air inside and outside the enclosed space, causing a sheet of inlet air to flow into the space, responsively to the static pressure difference, accelerating the air flow and directing the inlet air flow downward in an accelerated rolling stream gradually entraining air to be expelled from the space.
Claim 9
Dependent Claim
67 words
A process of ventilating an enclosed space comprising expelling air therefrom, thereby causing a static pressure difference between air inside and outside the enclosed space, causing a sheet of inlet air to flow into the space, responsively to the static pressure difference, accelerating the air flow and directing the inlet air flow downward in an accelerated rolling stream gradually entraining air to be expelled from the space.
Claim 10
Dependent Claim
37 words
A process of ventilating an enclosed space as set forth in claim 7 in which inlet air flow is controlled to maintain static air pressure differential between inside and outside to 0.01 to 0.20 inches of water.
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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |