US3965933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air duct made from sheet metal stamping
Assignee: Individual
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Filing: 1974-11-15
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Granted: 1976-06-29
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Expires: 1994-11-15
Abstract
Abstract A sheet metal stamping forming an air duct for use in heating and cooling systems and the like. The stamping has a generally rectangular shaped body portion and a protruding tongue portion extending from at least one side thereof. The stamping is foldable along its end edges and the tongue portion whereby two such stampings may be cooperatively engageable with a pair of side panels to form an air duct section having an inlet, outlet and a diverter or secondary outlet formed by the tongue portions. The tongue portions are adapted for connection to standard conventional take-off fittings.
Inventors
- 👤 Patrick L. Beaudin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:52
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/02; F24; F24F; F24F13/00; F24F13/02; F24F13/0236; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/877; Y10T137/87788; Y10T137/87812; Y10T428/00; Y10T428/12; Y10T428/12229; Y10T428/12236; Y10T428/1225; Y10T428/12257
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
A sheet metal duct section having an inlet and outlet comprising in combination: a prestamped upper and lower spaced panel interconnected by spaced side panels, at least one side panel being shorter in length than said upper and lower panels and defining an opening through which at least a portion of flow through said inlet is diverted, said upper and lower panels having end edges and a central body portion extending the length and width of said duct section from said inlet to said outlet and formed tongue portions extending laterally beyond said shortened side, said stampings being folded along their end edges and cooperatively engaged with said side panels to form the air duct section, and said tongue portions cooperatively forming a diverter outlet to divert flow through said inlet from said outlet, said duct having a diminishing cross section from said inlet to said outlet.
Claim 2
Dependent Claim
147 words
A sheet metal duct section having an inlet and outlet comprising in combination: a prestamped upper and lower spaced panel interconnected by spaced side panels, at least one side panel being shorter in length than said upper and lower panels and defining an opening through which at least a portion of flow through said inlet is diverted, said upper and lower panels having end edges and a central body portion extending the length and width of said duct section from said inlet to said outlet and formed tongue portions extending laterally beyond said shortened side, said stampings being folded along their end edges and cooperatively engaged with said side panels to form the air duct section, and said tongue portions cooperatively forming a diverter outlet to divert flow through said inlet from said outlet, said duct having a diminishing cross section from said inlet to said outlet.
Claim 3
Dependent Claim
58 words
The sheet metal duct section as defined in claim 1 and further including valve means in said duct section for closing said diverter outlet, said valve having supporting means thereon extending between said upper and lower panels and supporting said valve for pivotal movement, and means formed in said upper and lower panels for retaining said supporting means.
Claim 4
Dependent Claim
40 words
The duct section of claim 1 wherein said stamping includes a pair of said tongue members extending outwardly from each side of said stamping adjacent said inlet end to thereby form a pair of said diverter outlets adjacent said inlet.
Claim 5
Dependent Claim
56 words
The apparatus as defined in claim 3 and further including valve means in said duct section for closing each of said diverter outlets, said valve means having supporting means thereon extending between said upper and lower panels and supporting said valve means for pivotal movement, and means formed in said panels for retaining said supporting means.
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) | 1979-06-29 | 1979-12-29 | 1980-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-29 | 1983-12-29 | 1984-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-29 | 1987-12-29 | 1988-06-29 | $7700.00 | Window Closed / Lapsed |