US4137424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rail for supporting electrical fixtures
Assignee: STAFF KG
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Filing: 1977-04-25
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Granted: 1979-01-30
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Expires: 1997-04-25
Abstract
Abstract A supporting rail for supporting electrical fixtures or the like. The device comprises an extruded plastic elongate member which is formed at least in part by spaced inner and outer walls that are joined at spaced locations about the cross-sectional periphery of the member. The spaced walls define therebetween longitudinally extending hollow channels for carrying wires or the like, and the inner wall encloses an elongate inner chamber which is open along its length. A structurally rigid rail is thus provided but without requiring the use of substantially solid construction in the extruded rail.
Inventors
- 👤 Kurt Hesse
- 👤 Karl Wehling
- 👤 Alfred Staff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:58
CPC Classifications
H; H01; H01R; H01R25/00; H01R25/14
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
146 words
A supporting rail for supporting electrical fixtures of the like comprising: an extruded plastic elongate member formed at least in part by spaced inner and outer walls which are joined at spaced locations about the cross-sectional periphery of said member, siad inner wall enclosing an elongate inner chamber having an opening along its entire length, said outer wall being of generally C-shaped cross-section and including a flattened surface portion opposite the opening in said inner chamber, said spaced walls defining therebetween longitudinally extending hollow channels extending substantially about said periphery of said member, with said outer wall merging with said inner wall adjacent the opening in said inner chamber, said inner wall forming at least one elongate recess and at least one elongate projection over the length of said member for supporting electrical conductors and connecting elements of fixtures intended to be suspended from said member.
Claim 2
Dependent Claim
146 words
A supporting rail for supporting electrical fixtures of the like comprising: an extruded plastic elongate member formed at least in part by spaced inner and outer walls which are joined at spaced locations about the cross-sectional periphery of said member, siad inner wall enclosing an elongate inner chamber having an opening along its entire length, said outer wall being of generally C-shaped cross-section and including a flattened surface portion opposite the opening in said inner chamber, said spaced walls defining therebetween longitudinally extending hollow channels extending substantially about said periphery of said member, with said outer wall merging with said inner wall adjacent the opening in said inner chamber, said inner wall forming at least one elongate recess and at least one elongate projection over the length of said member for supporting electrical conductors and connecting elements of fixtures intended to be suspended from said member.
Claim 3
Dependent Claim
28 words
The rail of claim 1 in which said spaced walls and the hollow channels defined thereby are symmetrically disposed about a central plane passing through said inner chamber.
Claim 4
Dependent Claim
40 words
The rail of claim 1 in which said inner wall has a flattened portion lying opposite but spaced from said flattened surface portion of said outer wall, and ribs interconnecting the respective flattened portions of said inner and outer walls.
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) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |