US4514792A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture with triple insulating means
Assignee: Dal Partnership
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Filing: 1984-01-09
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Granted: 1985-04-30
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Expires: 2004-01-09
Abstract
Abstract A lighting fixture adapted to be mounted on a ceiling by attachment to an outlet box in the ceiling. The fixture comprises a crossbar attached to the bottom of the outlet box in a position extending horizontally across the bottom of the box and of such length as to extend at both ends beyond the box. The crossbar has downwardly extending legs and generally horizontally extending feet at the lower ends of the legs. The fixture further has a plate below the crossbar with thermally insulated spacer means between the plate and the crossbar. Screws secure the plate to the crossbar with the spacer means between the plate and the crossbar. The screws extend up through holes in the plate and are threaded into holes in the feet. A light source and diffuser for the light source are secured on the bottom of the plate and to the rim of the plate, respectively.
Inventors
- 👤 Dale A. Klaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:10
CPC Classifications
F; F21; F21V; F21V25/00; F21V3/00; F21V3/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
203 words
A lighting fixture adapted to be mounted on a ceiling by attachment to an outlet box in the ceiling, comprising: a crossbar adapted to be attached to the bottom of the outlet box in a position extending horizontally across the bottom of the box and of such length as to extend at both ends beyond the box, said crossbar having downwardly extending legs and generally horizontally extending feet at the lower ends of the legs, said legs and feet forming an elongate heat path for the reduction of heat transferred to the box; a plate below the crossbar with thermally insulated spacer means between the plate and the crossbar, said spacer means being positioned inside of said legs such that a gap results between said spacer means and each of said legs for exposing said heat path to the cooler air outside said lighting fixture; means securing the plate to the crossbar with the spacer means between the plate and the crossbar comprising screws extending up though holes in the plate threaded in holes in the feet; a light source on the bottom of the plate; and a diffuser for the light source secured to the plate at the rim of the plate.
Claim 2
Dependent Claim
203 words
A lighting fixture adapted to be mounted on a ceiling by attachment to an outlet box in the ceiling, comprising: a crossbar adapted to be attached to the bottom of the outlet box in a position extending horizontally across the bottom of the box and of such length as to extend at both ends beyond the box, said crossbar having downwardly extending legs and generally horizontally extending feet at the lower ends of the legs, said legs and feet forming an elongate heat path for the reduction of heat transferred to the box; a plate below the crossbar with thermally insulated spacer means between the plate and the crossbar, said spacer means being positioned inside of said legs such that a gap results between said spacer means and each of said legs for exposing said heat path to the cooler air outside said lighting fixture; means securing the plate to the crossbar with the spacer means between the plate and the crossbar comprising screws extending up though holes in the plate threaded in holes in the feet; a light source on the bottom of the plate; and a diffuser for the light source secured to the plate at the rim of the plate.
Claim 3
Dependent Claim
48 words
A lighting fixture as set forth in claim 1 wherein said thermally insulated spacer means is in the form of a pan and has a first insulation batt positioned in the pan thereby to reduce the transfer of heat generated by the light source to the outlet box.
Claim 4
Dependent Claim
23 words
A lighting fixture as set forth in claim 1 wherein said feet at the lower ends of the legs extend generally horizontally outwardly.
Claim 5
Dependent Claim
24 words
A lighting fixture as set forth in claim 2 wherein a second insulation batt is positioned below the plate and above said light source.
Claim 6
Dependent Claim
28 words
A lighting fixture as set forth in claim 4 wherein a third insulation batt is positioned between the top of the plate and the bottom of the pan.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-04-29 | 1988-10-29 | 1989-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-04-29 | 1992-10-29 | 1993-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-04-29 | 1996-10-29 | 1997-04-30 | $7700.00 | Window Closed / Lapsed |