US5115380A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Task light panel
Assignee: MillerKnoll Inc
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Filing: 1991-05-06
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Granted: 1992-05-19
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Expires: 2011-05-06
Abstract
Abstract A task light panel for use with a light source for illuminating a work surface. The panel comprises an upper surface having a plurality of transverse grooves formed thereon and a lower surface having a plurality of longitudinal grooves formed thereon. The transverse and longitudinal grooves are substantially perpendicular to each other and are adapted to distribute light from the light source onto the work surface, reduce glare or veiling reflections from the work surface, and block direct viewing of the light source by an individual using the work surface.
Inventors
- 👤 James H. Huisingh
- 👤 Edward L. Elzinga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:04
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0004; F21V33/0012; F21V5/00; F21V5/02; F21W; F21W2131/00; F21W2131/30; F21W2131/301; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
157 words
In combination, a work station having a work surface illuminated by a light source, and a panel interposed between the light source and the work surface for distributing light onto the work surface, said work surface including front and rear edges and opposed side edges, said panel comprising a first surface and a second surface; and a plurality of like asymmetrical first prisms on the panel first surface substantially parallel to the front edge; and a plurality of asymmetrical second prisms on the second surface substantially parallel to a side edge; said second prisms being substantially perpendicular to the first prisms; said panel being positioned adjacent the light source and away from the work surface a sufficient distance so that the prisms will refract light from the light source substantially toward the area bounded by the front, rear, and side edges for uniform illumination of the work surface and away from the area outside the work surface.
Claim 2
Dependent Claim
157 words
In combination, a work station having a work surface illuminated by a light source, and a panel interposed between the light source and the work surface for distributing light onto the work surface, said work surface including front and rear edges and opposed side edges, said panel comprising a first surface and a second surface; and a plurality of like asymmetrical first prisms on the panel first surface substantially parallel to the front edge; and a plurality of asymmetrical second prisms on the second surface substantially parallel to a side edge; said second prisms being substantially perpendicular to the first prisms; said panel being positioned adjacent the light source and away from the work surface a sufficient distance so that the prisms will refract light from the light source substantially toward the area bounded by the front, rear, and side edges for uniform illumination of the work surface and away from the area outside the work surface.
Claim 3
Dependent Claim
41 words
A work station according to claim 1 wherein the side edges are approximately 30 inches in length and the panel is positioned away from the work surface in the range of 16.75 inches to 25.25 inches away from the work surface.
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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) | 1995-05-19 | 1995-11-18 | 1996-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-19 | 1999-11-18 | 2000-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-19 | 2003-11-18 | 2004-05-19 | $7700.00 | Window Closed / Lapsed |