Patent US4011707A successfully refreshed from Google Patents.
US4011707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cross tee end joint for suspended ceiling system
Assignee: Armstrong World Industries Inc
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Filing: 1975-07-02
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Granted: 1977-03-15
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Expires: 1995-07-02
Abstract
Abstract An end detail is provided for a cross tee to provide positive engagement of the cross tee with the main runner of a suspended ceiling system. The end detail of the cross tee may be provided with means which will positively lock the tee in place to bracket-like structures on the main runner. The positive locking, yet removable, fastening means is provided to fasten the cross tee to the main runner of a suspended ceiling system.
Inventors
- 👤 Ernest B. Nute, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:31
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/06; E04B9/12; E04B9/127; F; F16; F16B; F16B7/00; F16B7/22; Y; Y10; Y10T; Y10T403/00; Y10T403/46; Y10T403/4602
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
345 words
A suspended ceiling grid structure adapted to support ceiling panels and the like, comprising: a. a main runner having a vertical web and oppositely disposed flanges, b. a cross tee having a vertical web and oppositely disposed flanges, a locking tongue means extending from at least one end of said cross tee, c. said locking tongue means extending generally perpendicular from the plane of the vertical web of the cross tee and being parallel with and adjacent with the vertical web of the main runner when the cross tee and main runner are properly positioned relative to each other, d. said vertical web of said main runner having a means engaging the bottom of said tongue means to hold said tongue means adjacent said vertical web of said main runner and restraining said tongue means from movement back and forth along the longitudinal axis of said vertical web of said main runner and restraining said cross tee fixedly in position relative said main runner, said means engaging the bottom of said tongue means is a bracket means engaging the bottom of said tongue means and said bracket means extends from the vertical web of the main runner structure and has an extension which extends parallel with the plane of said tongue means to hold said tongue means adjacent said vertical web of said main runner and to hold said cross tee and main runner in a fixed position, said tongue means has a notch forming shoulders on the bottom edge thereof which engage the sides of the bracket means to restrain the tongue means from movement along the longitudinal axis of said vertical web of said main runner, and e. said vertical web of said main runner further having a means which engages the top of said tongue means to restrain said tongue means from movement upward to prevent said tongue means from disengagement from said means engaging the bottom of said tongue means, said means engaging the top of said tongue means being a lance extending from the vertical web of said main runner.
Claim 2
Dependent Claim
345 words
A suspended ceiling grid structure adapted to support ceiling panels and the like, comprising: a. a main runner having a vertical web and oppositely disposed flanges, b. a cross tee having a vertical web and oppositely disposed flanges, a locking tongue means extending from at least one end of said cross tee, c. said locking tongue means extending generally perpendicular from the plane of the vertical web of the cross tee and being parallel with and adjacent with the vertical web of the main runner when the cross tee and main runner are properly positioned relative to each other, d. said vertical web of said main runner having a means engaging the bottom of said tongue means to hold said tongue means adjacent said vertical web of said main runner and restraining said tongue means from movement back and forth along the longitudinal axis of said vertical web of said main runner and restraining said cross tee fixedly in position relative said main runner, said means engaging the bottom of said tongue means is a bracket means engaging the bottom of said tongue means and said bracket means extends from the vertical web of the main runner structure and has an extension which extends parallel with the plane of said tongue means to hold said tongue means adjacent said vertical web of said main runner and to hold said cross tee and main runner in a fixed position, said tongue means has a notch forming shoulders on the bottom edge thereof which engage the sides of the bracket means to restrain the tongue means from movement along the longitudinal axis of said vertical web of said main runner, and e. said vertical web of said main runner further having a means which engages the top of said tongue means to restrain said tongue means from movement upward to prevent said tongue means from disengagement from said means engaging the bottom of said tongue means, said means engaging the top of said tongue means being a lance extending from the vertical web of said main runner.
Claim 3
Dependent Claim
307 words
A suspended ceiling grid structure adapted to support ceiling panels and the like, comprising: a. a main runner having a vertical web and oppositely disposed flanges, b. a cross tee having a vertical web and oppositely disposed flanges, a locking tongue means extending from at least one end of said cross tee, c. said locking tongue means extending generally perpendicular from the plane of the vertical web of the cross tee and being parallel with and adjacent with the vertical web of the main runner when the cross tee and main runner are properly positioned relative to each other, d. said vertical web of said main runner having a means engaging the bottom of said tongue means to hold said tongue means adjacent said vertical web of said main runner and restraining said tongue means from movement back and forth along the longitudinal axis of said vertical web of said main runner and restraining said cross tee fixedly in position relative to said main runner, said means for restraining said tongue means relative to the vertical web of the main runner being a pocket in said vertical web and said tongue means has a protrusion extending from the bottom edge of said tongue means and said protrusion engages said pocket to fixedly position said cross tee relative said main runner and to restrain the tongue means from movement along the longitudinal axis of said vertical web of said main runner, and e. said vertical web of said main runner further having a means which engages the top of said tongue means to restrain said tongue means from movement upward to prevent said tongue means from disengagement from said means engaging the bottom of said tongue means, said means engaging the top of said tongue means being a lance extending from the vertical web of said main runner.
Claim 4
Dependent Claim
307 words
A suspended ceiling grid structure adapted to support ceiling panels and the like, comprising: a. a main runner having a vertical web and oppositely disposed flanges, b. a cross tee having a vertical web and oppositely disposed flanges, a locking tongue means extending from at least one end of said cross tee, c. said locking tongue means extending generally perpendicular from the plane of the vertical web of the cross tee and being parallel with and adjacent with the vertical web of the main runner when the cross tee and main runner are properly positioned relative to each other, d. said vertical web of said main runner having a means engaging the bottom of said tongue means to hold said tongue means adjacent said vertical web of said main runner and restraining said tongue means from movement back and forth along the longitudinal axis of said vertical web of said main runner and restraining said cross tee fixedly in position relative to said main runner, said means for restraining said tongue means relative to the vertical web of the main runner being a pocket in said vertical web and said tongue means has a protrusion extending from the bottom edge of said tongue means and said protrusion engages said pocket to fixedly position said cross tee relative said main runner and to restrain the tongue means from movement along the longitudinal axis of said vertical web of said main runner, and e. said vertical web of said main runner further having a means which engages the top of said tongue means to restrain said tongue means from movement upward to prevent said tongue means from disengagement from said means engaging the bottom of said tongue means, said means engaging the top of said tongue means being a lance extending from the vertical web of said main runner.
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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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |