Patent US4580387A successfully refreshed from Google Patents.
US4580387A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosive resistant grid construction for a suspended ceiling
Assignee: DYROTECH INDUSTRIES Inc
•
Filing: 1984-12-12
•
Granted: 1986-04-08
•
Expires: 2004-12-12
Abstract
Abstract A clip is disclosed for joining fiberglass reinforced plastic grid members in order to provide a corrosive resistant frame work for a suspended ceiling. The grid members are of an inverted T configuration with an enlarged protrusion at the base of the T running the length of the member. The clip is resilient and generally U-shaped in cross-section with interiorly directed teeth which are able to engage and retain the protrusion on the grid members. Some clips are used to join grid members in end to end relation and others are provided with outwardly directed flanges and are used to hold ceiling panels in place.
Inventors
- 👤 David J. Rogers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:35
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/22; E04B9/24; E04B9/241; E04B9/242; E04B9/06; E04B9/10; E04B9/12; E04B9/127
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
167 words
In a suspended ceiling system comprising elongated main members and cross members each having a ceiling panel supporting flange extending outwardly from either side of the base of a web, the free end of the web terminating in a bead, said members being arranged in a grid, the improvement comprising: a plurality of resilient clips joining the cross members to either side of the main members, said clip being generally U-shaped in cross section and having a plurality of opposed pairs of inwardly directed teeth, one of said pairs of teeth of each clip engaging the bead of a cross member abutting a main member; each main member having a regularly spaced sequence of upwardly opening notches in the bead and each resilient clip having a medial slot extending upwardly from the lower end of the clip, the portion of each clip above the slot being received in the corresponding notch whereby the cross members are restricted from movement in the longitudinal direction of the main members.
Claim 2
Dependent Claim
167 words
In a suspended ceiling system comprising elongated main members and cross members each having a ceiling panel supporting flange extending outwardly from either side of the base of a web, the free end of the web terminating in a bead, said members being arranged in a grid, the improvement comprising: a plurality of resilient clips joining the cross members to either side of the main members, said clip being generally U-shaped in cross section and having a plurality of opposed pairs of inwardly directed teeth, one of said pairs of teeth of each clip engaging the bead of a cross member abutting a main member; each main member having a regularly spaced sequence of upwardly opening notches in the bead and each resilient clip having a medial slot extending upwardly from the lower end of the clip, the portion of each clip above the slot being received in the corresponding notch whereby the cross members are restricted from movement in the longitudinal direction of the main members.
Claim 3
Dependent Claim
31 words
In the suspended ceiling system of claim 1, the further improvement wherein said main and cross members and said first and second plurality of clips are formed of corrosive resistant materials.
Claim 4
Dependent Claim
221 words
A suspended ceiling system comprising: a plurality of members comprising elongated main members and cross members each having a ceiling supporting flange extending outwardly from both sides of the base of a web, the free end of the web terminating in a bead, said plurality of members being arranged in a grid; a plurality of ceiling panels supported by said ceiling panel supporting flanges; a plurality of elongated resilient clips extending along and joining pairs of said cross members in end to end relation on opposite sides of the web of a main member each said resilient clip spanning the main member and securing said cross members thereto, each of said resilient clips being generally U-shaped in cross section and having a medial slot extending up from the open end of the clip and receiving the web portion of the main member, said resilient clip further having a plurality of opposed pairs of inwardly directed teeth, one of said pairs of teeth of each clip retaining the beads of a pair of cross members; upwardly opening notches in the webs and beads of said main members located at the junctions of said cross members with said main members, said notches engaging the ends of said medial slots in corresponding clips to restrict the cross members against movement along said main members.
Claim 5
Dependent Claim
221 words
A suspended ceiling system comprising: a plurality of members comprising elongated main members and cross members each having a ceiling supporting flange extending outwardly from both sides of the base of a web, the free end of the web terminating in a bead, said plurality of members being arranged in a grid; a plurality of ceiling panels supported by said ceiling panel supporting flanges; a plurality of elongated resilient clips extending along and joining pairs of said cross members in end to end relation on opposite sides of the web of a main member each said resilient clip spanning the main member and securing said cross members thereto, each of said resilient clips being generally U-shaped in cross section and having a medial slot extending up from the open end of the clip and receiving the web portion of the main member, said resilient clip further having a plurality of opposed pairs of inwardly directed teeth, one of said pairs of teeth of each clip retaining the beads of a pair of cross members; upwardly opening notches in the webs and beads of said main members located at the junctions of said cross members with said main members, said notches engaging the ends of said medial slots in corresponding clips to restrict the cross members against movement along said main members.
References Cited (Backward Citations)
CA762142A
Cited
CA857010A
Cited
CA555365A
Cited
US3089570A
Cited
US3785110A
Cited
DE2143160A1
Cited
CA959229A
Cited
US3815309A
Cited
US3911638A
Cited
GB1502603A
Cited
US4027454A
Cited
US4154421A
Cited
CA1095682A
Cited
US4479341A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |