Patent EP0410716A2 successfully refreshed from Google Patents.
Patent US3721051A successfully refreshed from Google Patents.
US3721051A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bottomless sub-assembly for producing an underfloor electrical cable trench
Assignee: Robertson Co H H
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Filing: 1971-07-01
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Granted: 1973-03-20
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Expires: 1991-07-01
Abstract
Abstract A bottomless sub-assembly installed over metal cellular flooring and enclosing an upper surface portion of the flooring. The upper surface portion cooperates with the sub-assembly to create a structure which may be described as an underfloor electrical cable trench. The upper surface portion may be exposed to view by removing a cover plate of the sub-assembly. Vertically adjustable conduit means positioned beneath the cover plate, provides a separate enclosed passageway. A unique arrangement for distributing multi-conductor telephone cables is described.
Inventors
- 👤 F Fork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:26
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/28; H02G3/283
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
124 words
In an electrical wiring distributing floor structure including a metal subfloor and an overlying layer of concrete; said metal subfloor presenting alternating crests and troughs, and including metal cellular units providing generally parallel enclosed cells; the improvement comprising: a sub-assembly including opposite sides, each independently anchored in said concrete in fixed spaced-apart relationship; and a cover plate spanning the distance between said opposite sides; said sub-assembly extending transversely across said crests of said metal subfloor and being bottomless, whereby that upper surface portion of said metal subfloor in the region between said opposite sides, cooperates with said sub-assembly to create an underfloor electrical cable trench; said upper surface portion confronting said cover plate and being exposed to view when said cover plate is removed.
Claim 2
Dependent Claim
124 words
In an electrical wiring distributing floor structure including a metal subfloor and an overlying layer of concrete; said metal subfloor presenting alternating crests and troughs, and including metal cellular units providing generally parallel enclosed cells; the improvement comprising: a sub-assembly including opposite sides, each independently anchored in said concrete in fixed spaced-apart relationship; and a cover plate spanning the distance between said opposite sides; said sub-assembly extending transversely across said crests of said metal subfloor and being bottomless, whereby that upper surface portion of said metal subfloor in the region between said opposite sides, cooperates with said sub-assembly to create an underfloor electrical cable trench; said upper surface portion confronting said cover plate and being exposed to view when said cover plate is removed.
Claim 3
Dependent Claim
21 words
The improvement defined in claim 1 wherein said layer of concrete extends inwardly beneath said opposite sides and fills said troughs.
Claim 4
Dependent Claim
24 words
The improvement defined in claim 1 including a fire resistant material filling those portions of said troughs residing beneath and between said opposite sides.
Claim 5
Dependent Claim
36 words
The improvement defined in claim 1 including closure means disposed adjacent to each of said opposite sides for filling said troughs thereby to prevent ingress of said concrete into the interior of the formed cable trench.
Claim 6
Dependent Claim
31 words
The improvement defined in claim 4 wherein said closure means comprises plugs having a configuration corresponding to the transverse profile of said troughs and having upper edges engaging said opposite sides.
Claim 7
Dependent Claim
27 words
The improvement defined in claim 4 wherein said closure means comprises segments of said opposite sides extending downwardly into said troughs and essentially entirely closing said troughs.
Claim 8
Dependent Claim
33 words
The improvement defined in claim 4 wherein said closure means comprises separate members, one extending along each said opposite sides and presenting generally vertical segments extending into and essentially entirely closing said troughs.
Claim 9
Dependent Claim
38 words
The improvement defined in claim 1 wherein each of said opposite sides comprises a side rail supporting one edge of said cover plate, and a sub-rail positioned between said side rail and said crests of said metal subfloor.
Claim 10
Dependent Claim
35 words
The improvement defined in claim 1 including: an enclosed raceway extending downwardly from said cover plate between said side rails, said enclosed raceway including a bottom wall provided with longitudinally spaced openings exposing said crests.
Claim 11
Dependent Claim
25 words
The improvement defined in claim 9 wherein said bottom wall comprises longitudinally spaced transverse strips each positioned in the region of one of said troughs.
Claim 12
Dependent Claim
18 words
The improvement defined in claim 10 wherein said transverse strips are positioned below the level of said crests.
Claim 13
Dependent Claim
25 words
The improvement defined in claim 9 wherein said bottom wall comprises longitudinally spaced transverse strips each spanning the distance between adjacent ones of said crests.
Claim 14
Dependent Claim
44 words
The improvement defined in claim 9 wherein said enclosed raceway comprises: a generally U-shaped channel including upstanding side walls adjoining said bottom wall; and spaced-apart side plates, each extending downwardly from said cover plate and disposed adjacent to one of said upstandinG side walls.
Claim 15
Dependent Claim
32 words
The improvement defined in claim 9 wherein said raceway has an open top which is closed by said cover plate, said openings being exposed to view when said cover plate is removed.
Claim 16
Dependent Claim
22 words
The improvement defined in claim 1 including a multi-contact cable connector strip unit positioned in one of said troughs within said sub-assembly.
Claim 17
Dependent Claim
18 words
The improvement defined in claim 15 wherein said connector strip unit resides below the level of said crests.
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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) | 1976-03-19 | 1976-09-18 | 1977-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-19 | 1980-09-18 | 1981-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-19 | 1984-09-18 | 1985-03-20 | $7700.00 | Window Closed / Lapsed |