US4016729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curb-duct for roof top air conditioners
Assignee: KGI Inc
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Filing: 1975-04-28
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Granted: 1977-04-12
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Expires: 1995-04-28
Abstract
Abstract This invention describes an improved installation system for an air conditioning system which can be used for buildings, offices, or apartments usually where the roof is flat. It provides a shallow metal pan of cross-sectional area substantially that of the air conditioning equipment which is to be mounted on top of it. This pan is divided by a central wall into two plenums. There is an opening in the bottom of each plenum. The pan is mounted directly on the roof deck, and there is an appropriate opening in the roof deck immediately below the opening in the plenum. Means are provided for ducts to be connected between the openings in the plenums to extend through the roof to the ceiling of the room immediately below. A ceiling fixture, grill or diffuser is provided in the room, and the ducts are connected into the top of this ceiling fixture. Louvres in the ceiling fixture provide means for guiding returning air to the central grill of the fixture and for processed air to be distributed from the peripheral grills.
Inventors
- 👤 Louis E. Cherry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:30
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/10; E; E04; E04D; E04D13/00; E04D13/14; Y; Y10; Y10S; Y10S62/00; Y10S62/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
138 words
An air conditioning system adapted to receive and supply conditioned air from a roof top mounting opening to ceiling of a room below, comprising: a. a rectangular shallow pan divided into two contiguous chambers one surrounding the other, means for sealable mounting said pan on said roof top, each of said chambers having at least one opening in the bottom thereof, the two opening together matching said mounting opening in said roof, conduit means extending from said chambers to said ceiling of said room; b. means associated with said pan for supporting and fastening said air conditioning system to the top of said pan; c. ceiling fixture means in said room, including air inlet means and air outlet means and including means to connect to each of said air inlet and outlet means one of said conduit means.
Claim 2
Dependent Claim
138 words
An air conditioning system adapted to receive and supply conditioned air from a roof top mounting opening to ceiling of a room below, comprising: a. a rectangular shallow pan divided into two contiguous chambers one surrounding the other, means for sealable mounting said pan on said roof top, each of said chambers having at least one opening in the bottom thereof, the two opening together matching said mounting opening in said roof, conduit means extending from said chambers to said ceiling of said room; b. means associated with said pan for supporting and fastening said air conditioning system to the top of said pan; c. ceiling fixture means in said room, including air inlet means and air outlet means and including means to connect to each of said air inlet and outlet means one of said conduit means.
Claim 3
Dependent Claim
26 words
The system as in claim 1 in which: said chambers comprise a rectangular shallow pan of sheet metal with a dividing wall to create said chambers.
Claim 4
Dependent Claim
25 words
The system as in claim 2, wherein said means for sealable mounting said pan comprises: roofing material curved into the upstanding walls of said pan.
Claim 5
Dependent Claim
15 words
The system as in claim 1 in which: said conduits are substantially rigid sheet material.
Claim 6
Dependent Claim
158 words
In a totally enclosed air conditioning system adapted for flat roof-top mounting, with provision for ducts for passage of air to and from said system from and to a ceiling fixture in a room immediately subadjacent and spaced below said roof top, the improvement comprising: a. a double plenum means of sheet material mounted directly on said roof over at least one appropriate opening in said roof, and having upstanding walls; b. means to support and fasten said air conditioning system on top of said walls; c. at least two contiguous openings, surrounding each other, one in the bottom of each of said plenums and duct means operatively associated with each of said openings for carrying air to and from said plenums respectively; d. ceiling fixture means in said room comprising air distribution means and air reception means, and including means to connect to each of said air distribution and air reception means one of said duct means.
Claim 7
Dependent Claim
158 words
In a totally enclosed air conditioning system adapted for flat roof-top mounting, with provision for ducts for passage of air to and from said system from and to a ceiling fixture in a room immediately subadjacent and spaced below said roof top, the improvement comprising: a. a double plenum means of sheet material mounted directly on said roof over at least one appropriate opening in said roof, and having upstanding walls; b. means to support and fasten said air conditioning system on top of said walls; c. at least two contiguous openings, surrounding each other, one in the bottom of each of said plenums and duct means operatively associated with each of said openings for carrying air to and from said plenums respectively; d. ceiling fixture means in said room comprising air distribution means and air reception means, and including means to connect to each of said air distribution and air reception means one of said duct means.
Claim 8
Dependent Claim
48 words
The system as in claim 5 in which: said duct means comprises substantially rigid walls forming two substantially concentric rectangular ducts, a smaller duct forming a conduit for returning air positioned inside the larger one, the annular space between the two ducts forming a conduit for processed air.
Claim 9
Dependent Claim
45 words
The system as in claim 5 in which: said ceiling fixture means comprises a central rectangular grill for the passage to the central duct of returning air, and peripheral grill means, for passage of processed air from the annular conduit space between said two ducts.
Claim 10
Dependent Claim
37 words
The system as in claim 5, including: means in said curb unit for separating a first plenum for passage of processed air to said annular conduit, from a second plenum for returning air from the inner duct.
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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |