Patent US3748998A successfully refreshed from Google Patents.
US3748998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air bar construction for fire resistant suspended ceiling
Assignee: AIR FACTORS
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Filing: 1971-12-20
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Granted: 1973-07-31
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Expires: 1991-12-20
Abstract
Abstract Inner and outer members of an inverted T-bar assembly are rolled from sheet metal, each including a vertical web with a horizontal flange extending from the lower edge and a side facing elongated opening in a head portion along the upper edge. The members are riveted together with the horizontal flanges aligned and oppositely extending with a cap therearound to give an inverted T-shape with the upper wall of the inner member extending into the opening of the outer member to engage the upper wall thereof while the upper wall of the outer member is spaced thereabove to form an inwardly opening elongated cavity. Pairs of spacer channels have tongues extending into slots in the lower wall of the inner members to space pairs of inverted T-bar assemblies to form an air bar. The lip of an air plenum chamber flange extends into the opposed T-bar assembly head cavities to mount the chamber over the air bar. In an alternative embodiment, the cooperating slots and tongues are replaced by troughs receiving the edges of the spacer channels.
Inventors
- 👤 R Lambert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:24
CPC Classifications
F; F24; F24F; F24F13/00; F24F13/02; F24F13/06; F24F13/072; E; E04; E04B; E04B9/00; E04B9/02; E04B2009/026
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
222 words
An air diffuser bar for use in a suspended ceiling integrated air diffuser having the combination of an air plenum chamber in the attic over a suspended ceiling, with the outlet thereof directing air downwardly through the air bar, and air control means for controlling the flow of air through the air bar, the improvement in the air bar comprising : inner and outer elongated, generally L-shaped members, each of said members including a vertical web, a horizontal flange at the lower edge of said web extending in one direction away from said web and wall means at the upper edge of said web for defining an elongated head portion having an elongated opening therein facing in the other direction away from said web, said wall means being suitably spaced to provide an inwardly opening elongated cavity for receiving portions of the air control means when the members are secured together; means securing said members together with the horizontal flanges of each of the member aligned and oppositely extending to form an inverted T-bar assembly; and means for spacing pairs of inverted T-bar assemblies apart to provide an air bar for receiving the air plenum chamber thereover whereby air from the outlet thereof is directed between the spaced pairs of inverted T-bar assebmlies, to pass therethrough and to diffuse into the room.
Claim 2
Dependent Claim
222 words
An air diffuser bar for use in a suspended ceiling integrated air diffuser having the combination of an air plenum chamber in the attic over a suspended ceiling, with the outlet thereof directing air downwardly through the air bar, and air control means for controlling the flow of air through the air bar, the improvement in the air bar comprising : inner and outer elongated, generally L-shaped members, each of said members including a vertical web, a horizontal flange at the lower edge of said web extending in one direction away from said web and wall means at the upper edge of said web for defining an elongated head portion having an elongated opening therein facing in the other direction away from said web, said wall means being suitably spaced to provide an inwardly opening elongated cavity for receiving portions of the air control means when the members are secured together; means securing said members together with the horizontal flanges of each of the member aligned and oppositely extending to form an inverted T-bar assembly; and means for spacing pairs of inverted T-bar assemblies apart to provide an air bar for receiving the air plenum chamber thereover whereby air from the outlet thereof is directed between the spaced pairs of inverted T-bar assebmlies, to pass therethrough and to diffuse into the room.
Claim 3
Dependent Claim
94 words
The invention as in claim 1 wherein the head portion includes an upper wall, the upper wall of one of said members being spaced a greater distance from the horizontal flange of the one of said members than the upper wall of the other said members is spaced from the horizontal flange of the other of said members, said upper wall of the other of said members being received in the opening hollow said upper wAll of the one of said members when the members are assembled to provide the inwardly opening elongated cavity.
Claim 4
Dependent Claim
45 words
The invention as in claim 2 wherein the head portion includes a vertical wall, said upper wall of the other of said members engaging the vertical wall of the one of said members to space the vertical wall of the other of said members therefrom.
Claim 5
Dependent Claim
42 words
The invention as in claim 1 wherein air plenum chamber mounting means is provided, said mounting means including an elongated lip for being inserted into the elongated cavity of the air bar to secure the air plenum chamber to the air bar.
Claim 6
Dependent Claim
108 words
The invention as in claim 4 wherein said upper wall of the one said members extends in the other direction less than the distance the upper wall of the other of said members extends, said upper wall of the one of said members being spaced from the plane of the vertical wall of the other of said members when the members are together, said mounting means have a vertical section with the lip extending from the lower edge thereof, said vertical section passing between the edge of the upper of the one of said members and the plane of the vertical wall of the other of said members.
Claim 7
Dependent Claim
108 words
The invention as in claim 1 wherein the means spacing the pairs of inverted T-bar assemblies includes U-shaped spacer channels, each with an horizontal web flanked by vertical sides, said channels extending between vertical webs of the inner members of the pairs of inverted T-bar assemblies, and the wall means at the upper edge of said web include a lower wall extending in the one direction of the web, said wall having a downwardly opening trough formed therein at the upper edge of the vertical web, the edges of said vertical sides of said spacer channels being received in the troughs of the air of inverted T-bar assemblies.
Claim 8
Dependent Claim
119 words
The invention as in claim 1 wherein the means spacing the pairs of inverted T-bar assemblies includes U-shaped spacer channels, each with an horizontal web flanked by vertical sides, said channels extending between vertical webs of the inner members of the pairs of inverted T-bar assemblies and wherein a raised ridge is formed in the horizontal flange at the lower edge of the vertical web, said ridge having a multiplicity of spaced slots therein along the web, and the vertical sides of the spacer channels have a like number of spaced tongue means for being received in the spaced slots, said tongue means and said slots cooperating to hold the spacer channels between the pair of inverted T-bar assemblies.
Claim 9
Dependent Claim
115 words
The invention as in claim 1 wherein the means spacing the pairs of inverted T-bar assemblies includes U-shaped spacer channels, each with an horizontal web flanked by vertical sides, said channels extending between vertical webs of the inner members of the pairs of inverted T-bar assemblies, and wherein the head portion includes a lower wall extending in the one direction from the web, said wall having a multiplicity of spaced slots therein along the vertical web, and the vertical sides of the spacer channels have spaced tongue means for being received in the spaced slots , said tongue means and said slots cooperating to hole the spacer channels between the pair of inverted T-bar assemblies.
Claim 10
Dependent Claim
35 words
The invention as in claim 8 wherein some of the spacer channels have an apertured vertical plate between the vertical sides for closing the spaced thereof and for receiving hooks attached to the room ceiling.
Claim 11
Dependent Claim
164 words
In a suspended ceiling integrated air diffuser having an air plenum chamber opening through an air control means mounted in an air bar of inverted T-bar members spaced apart by spacer channels, the improvement in the inverted T-bar members for use in an air bar, comprising: inner and outer elongated generally L-shaped members said members each including a vertical web, a horizontal flange at the lower edge of said web extending in one direction away from said web and wall means at the upper edge of said web for defining aN elongated head portion having an opening therein facing in the other direction away from said web, said wall means of each of said members being suitably spaced apart from one another to provide an inwardly opening elongated cavity for receiving portions of the air control means when the members are secured together, and means securing the members together with the horizontal flanges thereof aligned and oppositely extending to form the inverted T-bar assembly.
Claim 12
Dependent Claim
164 words
In a suspended ceiling integrated air diffuser having an air plenum chamber opening through an air control means mounted in an air bar of inverted T-bar members spaced apart by spacer channels, the improvement in the inverted T-bar members for use in an air bar, comprising: inner and outer elongated generally L-shaped members said members each including a vertical web, a horizontal flange at the lower edge of said web extending in one direction away from said web and wall means at the upper edge of said web for defining aN elongated head portion having an opening therein facing in the other direction away from said web, said wall means of each of said members being suitably spaced apart from one another to provide an inwardly opening elongated cavity for receiving portions of the air control means when the members are secured together, and means securing the members together with the horizontal flanges thereof aligned and oppositely extending to form the inverted T-bar assembly.
Claim 13
Dependent Claim
73 words
The invention as in claim 10 wherein the head portion includes an upper wall, said upper wall of said outer member being a greater distance above the horizontal flange thereof than the upper wall of said inner member, when said members are assembled, the upper wall of the outer member being spaced above the upper wall of said inner member to define an elongate cavity therebetween to provide the inwardly opening elongated cavity.
Claim 14
Dependent Claim
45 words
The assembly as in claim 11 wherein the head portion includes a vertical wall, and the upper wall of the inner member extends into the opening of the outer member to engage the vertical wall thereof and space the vertical walls of the members apart.
Claim 15
Dependent Claim
37 words
The assembly as in claim 10 wherein the members have a ridge formed in the horizontal flange adjacent the vertical web, said ridge having a multiplicity of spaced slots therethrough adopted to receive tongues of spacer channels.
Claim 16
Dependent Claim
43 words
The member as in claim 10 wherein the head portion includes a horizontal wall extending in the one direction from said web, said wall having a multiplicity of spaced slots therethrough adjacent the vertical web, adopted to receive the tongues of spacer channels.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-30 | 1977-01-29 | 1977-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-30 | 1981-01-29 | 1981-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-30 | 1985-01-29 | 1985-07-31 | $7700.00 | Window Closed / Lapsed |