US4393323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lamp shield
Assignee: Plascore Inc
•
Filing: 1981-01-23
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Granted: 1983-07-12
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Expires: 2001-01-23
Abstract
Abstract An assembly for shielding a fluorescent light tube is disclosed. The assembly includes an elongated plastic, tubular shield having an inner peripheral surface and which is adapted to be disposed around the light tube. An elongated, expanded metal, generally tubular shaped heat sink is positioned adjacent the inner peripheral surface of the shield. The shield and heat sink are supported around the light tube by a pair of end caps.
Inventors
- 👤 Fritz Hubner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:47
CPC Classifications
F; F21; F21V; F21V29/00; F21V29/50; F21V29/70; F21V15/00; F21V17/00; F21V17/04; F21V25/00; F21V29/74; F21V29/85; F21V29/89
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
85 words
An assembly for shielding a fluorescent light tube, comprising: an elongated plastic, tubular shield having an inner peripheral surface; an elongated, one-piece expanded metal tubular shaped heat sink positioned within the shield and adjacent the inner peripheral surface of the shield, said heat sink defining a plurality of rows of apertures; and a pair of end caps positioned one at each end of said shield, said end caps including means for receiving the ends of said shield to support the assembly about the light tube.
Claim 2
Dependent Claim
85 words
An assembly for shielding a fluorescent light tube, comprising: an elongated plastic, tubular shield having an inner peripheral surface; an elongated, one-piece expanded metal tubular shaped heat sink positioned within the shield and adjacent the inner peripheral surface of the shield, said heat sink defining a plurality of rows of apertures; and a pair of end caps positioned one at each end of said shield, said end caps including means for receiving the ends of said shield to support the assembly about the light tube.
Claim 3
Dependent Claim
31 words
An assembly as defined by claim 1 wherein said heat sink is a one-piece expanded metal cloth formed by slitting and expanding a sheet of metal material to define said apertures.
Claim 4
Dependent Claim
21 words
An assembly as defined by claim 2 wherein said apertures of said cloth are arranged in a plurality of diagonal rows.
Claim 5
Dependent Claim
40 words
An assembly as defined by claim 3 wherein each of said apertures is bounded by generally parallel strips of metal and wherein all of said strips lie in the same plane when said cloth is unrolled to a flat condition.
Claim 6
Dependent Claim
52 words
An assembly as defined by claim 4 wherein said cloth is formed from an aluminum sheet having a thickness of approximately 0.010 inches and wherein each of said apertures is generally diamond-shaped and said parallel strips each have a length of approximately 0.040 inches and a transverse dimension of approximately 0.070 inches.
References Cited (Backward Citations)
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US3456103A
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US3564234A
Cited
US3673401A
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US3798481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |