Patent US3851674A successfully refreshed from Google Patents.
US3851674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Supplementary raceway for an underfloor electrical cable trench
Assignee: Robertson Co H H
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Filing: 1971-12-27
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Granted: 1974-12-03
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Expires: 1991-12-27
Abstract
Abstract A Supplementary Raceway adapted to be positioned beneath the cover plate and between the vertically adjustable side rails of an underfloor electrical cable trench, to provide a separate enclosed passageway. The supplementary raceway includes upstanding sides having upper edges disposed in supporting relation with the cover plate. The column strength of the opposite sides is enhanced by the provision of vertically presented corrugations.
Inventors
- 👤 F Fork
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:28
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/28; H02G3/283
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
115 words
In a supplementary raceway having a generally U-shaped configuration including a bottom wall provided with longitudinally spaced-apart openings and upstanding side walls integrally formed along the opposite longitudinal edges of said bottom wall, the improvement comprising: said upstanding side walls having vertically presented corrugations which enhance the column strength of the said side walls, said side walls presenting sinuous upper edges; side plates, one adjacent to each of said upstanding side walls and adjustable relative thereto, each of said side plates being provided with vertically presented corrugations mating with the said corrugations of said side walls; and means for securing each of said side plates to the adjacent upstanding side wall in vertically adjusted relation.
Claim 2
Dependent Claim
115 words
In a supplementary raceway having a generally U-shaped configuration including a bottom wall provided with longitudinally spaced-apart openings and upstanding side walls integrally formed along the opposite longitudinal edges of said bottom wall, the improvement comprising: said upstanding side walls having vertically presented corrugations which enhance the column strength of the said side walls, said side walls presenting sinuous upper edges; side plates, one adjacent to each of said upstanding side walls and adjustable relative thereto, each of said side plates being provided with vertically presented corrugations mating with the said corrugations of said side walls; and means for securing each of said side plates to the adjacent upstanding side wall in vertically adjusted relation.
Claim 3
Dependent Claim
85 words
In a supplementary raceway having a generally U-shaped configuration including a bottom wall provided with longitudinally spaced-apart openings and upstanding side walls integrally formed along the opposite longitudinal edges of said bottom wall, the improvement comprising: said upstanding side walls having vertically presented corrugations which enhance the column strength of the said side walls, said side walls presenting sinuous upper edges; said vertically presented corrugations being provided only in those regions of said upstanding side walls adjacent to the said openings in said bottom wall.
Claim 4
Dependent Claim
85 words
In a supplementary raceway having a generally U-shaped configuration including a bottom wall provided with longitudinally spaced-apart openings and upstanding side walls integrally formed along the opposite longitudinal edges of said bottom wall, the improvement comprising: said upstanding side walls having vertically presented corrugations which enhance the column strength of the said side walls, said side walls presenting sinuous upper edges; said vertically presented corrugations being provided only in those regions of said upstanding side walls adjacent to the said openings in said bottom wall.
Claim 5
Dependent Claim
60 words
The supplementary raceway of claim 2 including side plates, one adjacent to each of said upstanding side walls and vertically adjustable relative thereto, each of said side plates including vertically presented corrugations mating with the corrugations of said upstanding side walls; and means for securing each of said side plates to the adjacent upstanding side wall in vertically adjusted relation.
Claim 6
Dependent Claim
181 words
In an underfloor electrical cable trench including a pair of vertically adjustable side rails maintained in fixed spaced-apart relationship, a cover spanning the distance between and supported by said side rails; and a supplementary raceway disposed beneath said cover plate and between said side rails, said raceway having a generally U-shaped configuration including a bottom wall having longitudinally spaced-apart openings provided therein and opposite upstanding sides integral with said bottom wall, the improvement comprising: said opposite upstanding sides having vertically presented corrugations and sinuous upper edges disposed in supporting relation with said cover plate; said opposite sides of said supplementary raceway comprising: upstanding side walls presented along the opposite longitudinal edges of said bottom wall and provided with the said vertically presented corrugations; side plates, one overlapping each of said upstandIng side walls and being provided with vertically presented corrugations mating with the corrugations of said upstanding side walls; and means for securing each of said side plates to the adjacent upstanding side wall in vertically adjusted relation with the upper edges thereof disposed in supporting relation with said cover plate.
Claim 7
Dependent Claim
181 words
In an underfloor electrical cable trench including a pair of vertically adjustable side rails maintained in fixed spaced-apart relationship, a cover spanning the distance between and supported by said side rails; and a supplementary raceway disposed beneath said cover plate and between said side rails, said raceway having a generally U-shaped configuration including a bottom wall having longitudinally spaced-apart openings provided therein and opposite upstanding sides integral with said bottom wall, the improvement comprising: said opposite upstanding sides having vertically presented corrugations and sinuous upper edges disposed in supporting relation with said cover plate; said opposite sides of said supplementary raceway comprising: upstanding side walls presented along the opposite longitudinal edges of said bottom wall and provided with the said vertically presented corrugations; side plates, one overlapping each of said upstandIng side walls and being provided with vertically presented corrugations mating with the corrugations of said upstanding side walls; and means for securing each of said side plates to the adjacent upstanding side wall in vertically adjusted relation with the upper edges thereof disposed in supporting relation with said cover plate.
Claim 8
Dependent Claim
113 words
In an underfloor electrical cable trench including a pair of vertically adjustable side rails maintained in fixed spaced-apart relationship, a cover spanning the distance between and supported by said side rails, and a supplementary raceway disposed beneath said cover plate and between said side rails, said raceway having a generally U-shaped configuration including a bottom wall having longitudinally spaced-apart openings provided therein and opposite upstanding sides integral with said bottom wall, the improvement comprising: said opposite upstanding sides having vertically presented corrugations provided only in those regions of said opposite upstanding sides adjacent to the said openings in said bottom wall and sinuous upper edges disposed in supporting relation with said cover plate.
Claim 9
Dependent Claim
113 words
In an underfloor electrical cable trench including a pair of vertically adjustable side rails maintained in fixed spaced-apart relationship, a cover spanning the distance between and supported by said side rails, and a supplementary raceway disposed beneath said cover plate and between said side rails, said raceway having a generally U-shaped configuration including a bottom wall having longitudinally spaced-apart openings provided therein and opposite upstanding sides integral with said bottom wall, the improvement comprising: said opposite upstanding sides having vertically presented corrugations provided only in those regions of said opposite upstanding sides adjacent to the said openings in said bottom wall and sinuous upper edges disposed in supporting relation with said cover plate.
Claim 10
Dependent Claim
34 words
The improvement of claim 4 wherein the said vertically presented corrugations are provided in those regions of said upstanding sidewalls and of said side plates adjacent to the said openings in said bottom wall.
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) | 1977-12-02 | 1978-06-03 | 1978-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-02 | 1982-06-03 | 1982-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-02 | 1986-06-03 | 1986-12-03 | $7700.00 | Window Closed / Lapsed |