Patent US4434599A successfully refreshed from Google Patents.
US4434599A
Expired / Lapsed
US
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Drop ceiling frame construction
Assignee: Specified Ceiling Systems
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Filing: 1982-03-30
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Granted: 1984-03-06
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Expires: 2002-03-30
Abstract
Abstract A T-frame member for a drop ceiling, made of rolled sheet metal, in which a web section is joined to a pair of coplanar flange members by a connecting channel section, the flange sections being joined to and extending outwardly from the respective outer edges of the two channel side walls. The inner edges of the flanges form lips projecting toward each other between the side walls. Partition studs having a collar slightly larger than the space between the lips are snapped into the channel sections and are retained by the collar, the studs projecting out through the space between the lips. Clips lock the flanges together after the studs are in place.
Inventors
- 👤 Francis L. McCall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 10:20
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/065; E04B9/067; E04B9/068; E04B9/006; E04B9/12; E04B9/122
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
237 words
A rolled sheet metal longitudinal T-frame member for a drop ceiling to support ceiling tiles or the like comprising: a web section formed of two sheet metal layers joined along a longitudinal edge, a channel section having two parallel side walls joined by a transverse wall, the sheet metal layers of web section being joined along a longitudinal edge to the side walls of the channel section by respective sheet metal sections forming the transverse wall, the side walls of the channel section extending parallel to and away from the web section, a pair of flange sections lying in a common plane extending perpendicular to the plane of the web section, each flange section being formed of two layers of sheet metal joined along the outer edge of the flange section, one layer of each flange section being joined along one longitudinal edge to the outer edge of a respective one of the side walls of the channel section, the flange sections projecting outwardly away from the respective side walls and forming a flat supporting surface on either side of the channel section for supporting ceiling tiles, the other layer of each of the flange sections including a lip extending into the space between the parallel side walls of the channel section, each lip terminating in an edge extending inwardly toward the transverse wall of the channel, the lips having a gap between the inwardly extending edges.
Claim 2
Dependent Claim
237 words
A rolled sheet metal longitudinal T-frame member for a drop ceiling to support ceiling tiles or the like comprising: a web section formed of two sheet metal layers joined along a longitudinal edge, a channel section having two parallel side walls joined by a transverse wall, the sheet metal layers of web section being joined along a longitudinal edge to the side walls of the channel section by respective sheet metal sections forming the transverse wall, the side walls of the channel section extending parallel to and away from the web section, a pair of flange sections lying in a common plane extending perpendicular to the plane of the web section, each flange section being formed of two layers of sheet metal joined along the outer edge of the flange section, one layer of each flange section being joined along one longitudinal edge to the outer edge of a respective one of the side walls of the channel section, the flange sections projecting outwardly away from the respective side walls and forming a flat supporting surface on either side of the channel section for supporting ceiling tiles, the other layer of each of the flange sections including a lip extending into the space between the parallel side walls of the channel section, each lip terminating in an edge extending inwardly toward the transverse wall of the channel, the lips having a gap between the inwardly extending edges.
Claim 3
Dependent Claim
70 words
The T-frame member of claim 1 further including: at least one threaded stud having projecting shoulders near one end, said one end of the stud being inserted into the gap between the lips into the channel by springing the lips apart slightly to allow the shoulders to pass, the shoulders being engaged by the inwardly extending edges of the lips to prevent withdrawal of the stud from between the lips.
Claim 4
Dependent Claim
39 words
The T-frame member of claim 1 further including: a clip member spanning the flange sections and engaging the outer edges of the flange sections, the clip securing the flange sections and lips from moving apart and releasing the stud.
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) | 1987-03-06 | 1987-09-05 | 1988-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-06 | 1991-09-05 | 1992-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-06 | 1995-09-05 | 1996-03-06 | $7700.00 | Window Closed / Lapsed |