Patent US4494175A successfully refreshed from Google Patents.
US4494175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recessed lighting fixture with improved louver mounting
Assignee: Osram Sylvania Inc
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Filing: 1984-01-09
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Granted: 1985-01-15
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Expires: 2004-01-09
Abstract
Abstract A recessed lighting fixture used in association with a suspended ceiling system made up of several spaced grid members. The lighting fixture is comprised of a fixture housing having means for supporting at least one fluorescent lamp and includes a relatively thin deflectable top plate which in turn may include a reflecting surface disposed over the fluorescent lamp. Means are provided for securing the fixture housing to the grid members. The louver assembly of the fixture is mounted in a simplified manner and includes a top portion designed to contact the deflectable top plate during insertion and a bottom portion including longitudinally extending sides designed to rest upon and be supported by the spaced grid members. The louver's bottom portions are insertable on the grid members in sequence, first one and then the other, whereby the louver assembly is firmly supported in the fixture housing without the requirement of additional hardware such as springs, latches or the like.
Inventors
- 👤 Mahmoud A. Gawad
- 👤 John Graudins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:36
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/02; F21V; F21V15/00; F21V15/01; F21V15/015; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
249 words
A recessed lighting fixture adapted for use in association with a suspended ceiling structure having a grid support comprised of spacedly positioned grid members, said lighting fixture comprising a fixture housing having means at the top thereof for supporting a pair of spaced lamp socket members, said housing open at the bottom thereof, a relatively thin, deflectable top plate member secured to said housing or forming a part thereof and defining an optically reflecting surface disposed adjacent said lamp socket members, means securing said fixture housing to said grid support between said spacedly positioned grid members, and louver means having a top portion adapted to contact said deflectable top plate member and a bottom portion including longitudinally extending sides for resting upon and being supported by a respective one of said spacedly positioned grid members, said louver means not fixedly attached to said suspended ceiling structure, said bottom portions of said louver means being insertable on each of said grid members in sequence, one and then the other, said deflectable top plate member deflecting upwardly in a pivotal manner upon said contact with said top portion of said louver means during said insertion of said louver means on said grid members to facilitate said insertion and thereafter exerting a substantially downward force on said louver means to assist in maintaining said louver means in position on said grid members, whereby said louver means is supported in said fixture housing without the use of supporting springs, latches or the like.
Claim 2
Dependent Claim
249 words
A recessed lighting fixture adapted for use in association with a suspended ceiling structure having a grid support comprised of spacedly positioned grid members, said lighting fixture comprising a fixture housing having means at the top thereof for supporting a pair of spaced lamp socket members, said housing open at the bottom thereof, a relatively thin, deflectable top plate member secured to said housing or forming a part thereof and defining an optically reflecting surface disposed adjacent said lamp socket members, means securing said fixture housing to said grid support between said spacedly positioned grid members, and louver means having a top portion adapted to contact said deflectable top plate member and a bottom portion including longitudinally extending sides for resting upon and being supported by a respective one of said spacedly positioned grid members, said louver means not fixedly attached to said suspended ceiling structure, said bottom portions of said louver means being insertable on each of said grid members in sequence, one and then the other, said deflectable top plate member deflecting upwardly in a pivotal manner upon said contact with said top portion of said louver means during said insertion of said louver means on said grid members to facilitate said insertion and thereafter exerting a substantially downward force on said louver means to assist in maintaining said louver means in position on said grid members, whereby said louver means is supported in said fixture housing without the use of supporting springs, latches or the like.
Claim 3
Dependent Claim
24 words
The recessed lighting fixture as set forth in claim 1 wherein said means for supporting said lamp socket members comprises a channel strip member.
Claim 4
Dependent Claim
22 words
The recessed lighting fixture as set forth in claim 2 wherein said fixture housing includes an end piece at each end thereof.
Claim 5
Dependent Claim
35 words
The recessed lighting fixture as set forth in claim 3 including means for fastening said deflectable member to said channel strip member and for fastening each of said end pieces to said channel strip member.
Claim 6
Dependent Claim
21 words
The recessed lighting fixture as set forth in claim 4 wherein each of said grid members comprises an elongated, T-shaped bar.
Claim 7
Dependent Claim
43 words
The recessed lighting fixture as set forth in claim 5 wherein said means for securing said fixture housing to said grid support comprises a plurality of T-bar clamps, a pair of said clamps being connected to each end piece along respective sides thereof.
Claim 8
Dependent Claim
29 words
The recessed lighting fixture as set forth in claim 1 wherein said deflectable top plate member is substantially planar and substantially defines the top part of said fixture housing.
Claim 9
Dependent Claim
52 words
The recessed lighting fixture as set forth in claim 7 wherein said longitudinally extending sides of said louver means each include an upper flange portion for providing said contact with said deflectable member to cause such deflectable member to be upwardly deflected during positioning of said louver means within said fixture housing.
Claim 10
Dependent Claim
50 words
The recessed lighting fixture as set forth in claim 8 wherein said longitudinally extending sides of said bottom portion of said louver means each include a flange portion, said flange portion resting upon a respective one of said grid members when said louver means is positioned within said fixture housing.
Claim 11
Dependent Claim
53 words
The recessed lighting fixture as set forth in claim 9 wherein each of said grid members comprises a T-shaped bar having a horizontal leg and a vertical leg, each of said flanges of said bottom portion of said louver means resting upon and being supported by a respective one of said horizontal legs.
Claim 12
Dependent Claim
69 words
The recessed lighting fixture as set forth in claim 10 wherein the outer distance between said flanges of said bottom portion of said louver means is less than the distance between said vertical legs of said T-shaped bars having said louver means thereon but greater than the distance between said horizontal legs of said T-shaped bars having said flanges of said bottom portion of said louver means resting thereon.
Claim 13
Dependent Claim
24 words
The recessed lighting fixture as set forth in claim 1 including a gasket between the portion of said louver means and said deflectable member.
Claim 14
Dependent Claim
43 words
The recessed lighting fixture as set forth in claim 1 wherein said sides of said louver means are each of a substantially parabolic configuration, said louver means further including a plurality of cross pieces, said sides extending substantially higher than said cross pieces.
Claim 15
Dependent Claim
38 words
The recessed lighting fixture as set forth in claim 1 including at least one safety line interconnecting said fixture housing and said louver means to enable said louver means to be suspended from said housing when removed therefrom.
References Cited (Backward Citations)
US4268897A
Cited
US4429354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-01-15 | 1988-07-16 | 1989-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-15 | 1992-07-16 | 1993-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-15 | 1996-07-16 | 1997-01-15 | $7700.00 | Window Closed / Lapsed |