Patent US814182A successfully refreshed from Google Patents.
Patent US3687168A successfully refreshed from Google Patents.
US3687168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Duct system
Assignee: Johns Manville Corp
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Filing: 1970-06-29
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Granted: 1972-08-29
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Expires: 1990-06-29
Abstract
Abstract An aluminum extrusion molding with multiple flanges for gripping and supporting both duct board paneling and longitudinal support members. Duct structures are made of the above molding in combination with duct board paneling wherein a single piece of molding is formed into a duct board frame defining the periphery of the duct. The molding gripping flanges have extended beads for gripping the duct board which beads also enhance the seal between molding and duct board.
Inventors
- 👤 James Webster Sherman
- 👤 James William Helmick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:35
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/0254; F16; F16L; F16L25/00; F16L25/0009; Y; Y10; Y10S; Y10S138/00; Y10S138/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
215 words
A duct comprising: a frame transverse with respect to said duct and generally defining the cross-sectional configuration of said duct, said frame comprising a molding having first and second flanges spaced with respect to each other and joined by a web, said molding being closed upon itself with the web lying in a plane transverse with respect to said duct, said first and second flanges having opposed major faces, said first flange having a bead extending longitudinally thereof and projecting toward the opposed major face of said second flange, said second flange having a bead extending longitudinally thereof and projecting toward the opposed major face of said first flange, said beads being spaced from said web and each other, panelling of yieldable resilient material, said panelling having transverse edges which are greater in thickness than the spacing between said beads and substantially equal to the spacing between said flanges, said transverse edges of said panelling being fitted between said beads of said molding whereby said beads compress and frictionally engage said panelling to impede any flow of fluids between said panelling and said molding, said panelling having at least two longitudinal edges extending from said transverse edges and in proximity to each other, and means to couple said proximate longitudinal edges to form a duct.
Claim 2
Dependent Claim
215 words
A duct comprising: a frame transverse with respect to said duct and generally defining the cross-sectional configuration of said duct, said frame comprising a molding having first and second flanges spaced with respect to each other and joined by a web, said molding being closed upon itself with the web lying in a plane transverse with respect to said duct, said first and second flanges having opposed major faces, said first flange having a bead extending longitudinally thereof and projecting toward the opposed major face of said second flange, said second flange having a bead extending longitudinally thereof and projecting toward the opposed major face of said first flange, said beads being spaced from said web and each other, panelling of yieldable resilient material, said panelling having transverse edges which are greater in thickness than the spacing between said beads and substantially equal to the spacing between said flanges, said transverse edges of said panelling being fitted between said beads of said molding whereby said beads compress and frictionally engage said panelling to impede any flow of fluids between said panelling and said molding, said panelling having at least two longitudinal edges extending from said transverse edges and in proximity to each other, and means to couple said proximate longitudinal edges to form a duct.
Claim 3
Dependent Claim
31 words
The duct according to claim 1 wherein said panelling has a thickness less than the spacing of said flanges and greater than the spacing normal of said flanges between said beads.
Claim 4
Dependent Claim
86 words
The duct according to claim 1 wherein said web extends beyond said first flange on the side of said flange opposite said second flange and including a third flange affixed to said web and generally parallel to said first flange a given distance therefrom, and a structural member having a portion of a thickness to fit between said third and first flanges with a press fit has an edge received between said third and first flanges whereby said molding and said structural member are secured together.
Claim 5
Dependent Claim
48 words
The duct according to claim 3 wherein there are a pair of said frames which are spaced from each other and said structural member is a longitudinal support extending between said frames and having an edge portion press fitted between said third and first flanges of each frame.
Claim 6
Dependent Claim
78 words
The duct according to claim 4 wherein said structural member is of elongated form having a major element having a front and rear face and at least one flange extending from said front face of said major element a distance from said rear face of said major element corresponding generally to a distance greater than the spacing between said third and first flanges whereby said element and flange have a press fit between said third and first flanges.
Claim 7
Dependent Claim
18 words
The duct according to claim 5 wherein said rear face of said major element is adjacent said panelling.
Claim 8
Dependent Claim
51 words
The duct according to claim 6 wherein said panelling is closed upon itself in planes perpendicular to the plane of said web to form a closed duct adapted a convey fluids under positive pressure relative to ambient, and wherein said third flange of said molding is exterior of said closed duct.
Claim 9
Dependent Claim
50 words
The duct according to claim 6 wherein said panelling is closed upon itself in planes perpendicular to the plane of said web to form a closed duct adapted to convey fluids under negative pressure relative to ambient, and wherein said third flange of said molding is within said closed duct.
Claim 10
Dependent Claim
198 words
The duct according to claim 1 including fourth and fifth flanges on said molding complementary to said first and second flanges respectively and extending from an opposite side of said web in registry with said first and second flanges, said fourth and fifth flanges having opposed major faces, a bead extending longitudinally of said fourth flange and projecting toward the opposed major face of said fifth flange, a bead extending longitudinally of said fifth flange and projecting toward the opposed major face of said fourth flange, each of said beads on said fourth and fifth flanges being spaced from said web, additional panelling of yieldable resilient material, said additional panelling having transverse edges which are greater in thickness than the spacing between said beads of said fourth and fifth flanges and substantially equal to the spacing between said fourth and fifth flanges, said transverse edges of said additional panelling being fitted between said beads on said fourth and fifth flanges, said additional panelling having at least two longitudinal edges extending from said transverse edges thereof and in proximity to each other, and means to couple said proximate longitudinal edges of said additional panelling to form a duct section.
Claim 11
Dependent Claim
17 words
The duct according to claim 1 wherein said panelling is a mat of resin bounded glass fibers.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |