US4429354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture louver
Assignee: Thomas Industries Inc
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Filing: 1982-09-29
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Granted: 1984-01-31
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Expires: 2002-09-29
Abstract
Abstract In a lighting fixture louver assembly in which a plurality of louvers with side walls joined at their lower edges by a closed bottom, generally V-shaped in end elevation, are connected to side or end rails, an extension is provided of the lower portion of the louvers, projecting beyond a contiguous upper portion of the ends of the side walls, and cut wings are formed in the extension. The rails have a slot in a side wall extending upwardly from immediately adjacent the bottom edge of the wall and of a size to receive the extension. The extension projects through the slot, and the wings are bent outwardly laterally along a line substantially parallel to the long axis of the louver, a cut surface of each of the wings engaging the back surface of the side wall, whereby the closed bottom of the louver projects uninterruptedly through the side wall of the rail.
Inventors
- 👤 Willard R. Garnett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:12
CPC Classifications
F; F21; F21V; F21V11/00; F21V11/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
155 words
In a lighting fixture louver assembly in which a plurality of louvers, generally V-shaped in end elevation with side walls forming a narrow lower portion joined by a closed bottom, are connected to side or end rails, the improvement comprising an extension of a lower portion of said side walls and bottom at an end of said louvers projecting beyond a contiguous upper portion of said end, and cut wings integral with said lower portion, said rails having in a side wall slots extending upwardly from immediately adjacent the bottom edge of said wall and of a size to receive said extension, said extension projecting therethrough, said wings being spread laterally along lines substantially parallel to the long axis of said louver behind and a cut surface of each of said wings engaging the back surface of said side wall, said closed bottom of said louver projecting uninterruptedly through said side wall of said rail.
Claim 2
Dependent Claim
155 words
In a lighting fixture louver assembly in which a plurality of louvers, generally V-shaped in end elevation with side walls forming a narrow lower portion joined by a closed bottom, are connected to side or end rails, the improvement comprising an extension of a lower portion of said side walls and bottom at an end of said louvers projecting beyond a contiguous upper portion of said end, and cut wings integral with said lower portion, said rails having in a side wall slots extending upwardly from immediately adjacent the bottom edge of said wall and of a size to receive said extension, said extension projecting therethrough, said wings being spread laterally along lines substantially parallel to the long axis of said louver behind and a cut surface of each of said wings engaging the back surface of said side wall, said closed bottom of said louver projecting uninterruptedly through said side wall of said rail.
Claim 3
Dependent Claim
69 words
The improvement of claim 1 including an upper extension of each of said louver side walls, below an upper edge of the said walls, said rails having slots in said rail side wall below the upper edge thereof to receive said extensions, and wings on said extensions, said extensions extending through said slots and said wings being spread along lines substantially parallel to the long axis of said louver.
Claim 4
Dependent Claim
101 words
In a lighting fixture gusset assembly in which main and side rail gussets are connected to define a luminaire opening, the improvement comprising slots in a wall of the main rail gussets and tongues integral with and projecting from a wall of said side rail gussets, each of said tongues projecting through one of said slots, and cut wings integral with said tongues, said wings being spread laterally along lines substantially parallel to the long axis of the said side rail gusset behind and a cut surface of each of said wings engaging the back surface of said main rail gusset.
Claim 5
Dependent Claim
101 words
In a lighting fixture gusset assembly in which main and side rail gussets are connected to define a luminaire opening, the improvement comprising slots in a wall of the main rail gussets and tongues integral with and projecting from a wall of said side rail gussets, each of said tongues projecting through one of said slots, and cut wings integral with said tongues, said wings being spread laterally along lines substantially parallel to the long axis of the said side rail gusset behind and a cut surface of each of said wings engaging the back surface of said main rail gusset.
Claim 6
Dependent Claim
58 words
The improvement of claim 3 wherein the slots in the main rail gusset wall are slanted convergently upwardly, and the side wall of the side rail gusset slants in the same general direction but at a different angle from the vertical, the tongues of the side rail gusset lying in the same plane as the said side wall.
Claim 7
Dependent Claim
79 words
The improvement of claim 1 including a flange extending along and projecting inboardly from the upper edge of each louver side wall toward one another and projecting as a tongue beyond said upper edge at an end of said louver in a plane substantially parallel to an upper edge of a contiguous rail and extending over said upper edge of said rail, and being bent down thereover along a line parallel to the said upper edge of said rail.
References Cited (Backward Citations)
US3124310A
Cited
US4268897A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |