US3570546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lay-in conduit duct
Assignee: SUPERIOR SWITCHBOARD AND DEVICES COMPANY
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Filing: 1969-02-24
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Granted: 1971-03-16
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Expires: 1989-02-24
Abstract
Abstract A fluidtight, lay-in duct for a conduit, having adjoining trough sections with flanges which are joined with an interposed gasket and having upstanding sidewalls terminating in sealing surfaces which are sealingly closed over a portion of their longitudinal extent by spaced trough covers having mating sealing members. The portion between the spaced trough covers is sealed by a removable insert spanning the joint between the trough sections and having a plate portion traversing the upstanding sidewalls, projecting flanges on the plate underlapping the trough covers, and sealing members between the removable insert and the sealing surfaces and trough covers.
Inventors
- 👤 James H Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:57
CPC Classifications
H; H02; H02G; H02G3/00; H02G3/02; H02G3/06; H02G3/0608
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
174 words
In a lay-in duct for conduit having adjoining trough sections joined by flanges with an interposed abutting gasket and provided with upstanding sidewalls terminating in sealing surfaces selectively sealingly closed over a portion of their longitudinal extent by spaced trough covers having mating sealing members, removable insert means spanning adjoining trough sections comprising, gusset plate means extending transversely of and supported by the trough sections, projecting flange means on said gusset plate means underlapping the spaced trough covers and extending transversely of the trough sections to a position proximate the sealing surfaces of the upstanding sidewalls, first sealing means interposed between said gusset plate means and the sealing surfaces and having edges extending inwardly of the sealing surfaces and between the extremities of the sealing surfaces and of the projecting flange means when the trough covers are closed, and second sealing means interposed between said projecting flange means and the adjacent trough covers, whereby closure of the trough covers provides a continuous seal of the trough sections for absolute fluidtight integrity of the duct.
Claim 2
Dependent Claim
174 words
In a lay-in duct for conduit having adjoining trough sections joined by flanges with an interposed abutting gasket and provided with upstanding sidewalls terminating in sealing surfaces selectively sealingly closed over a portion of their longitudinal extent by spaced trough covers having mating sealing members, removable insert means spanning adjoining trough sections comprising, gusset plate means extending transversely of and supported by the trough sections, projecting flange means on said gusset plate means underlapping the spaced trough covers and extending transversely of the trough sections to a position proximate the sealing surfaces of the upstanding sidewalls, first sealing means interposed between said gusset plate means and the sealing surfaces and having edges extending inwardly of the sealing surfaces and between the extremities of the sealing surfaces and of the projecting flange means when the trough covers are closed, and second sealing means interposed between said projecting flange means and the adjacent trough covers, whereby closure of the trough covers provides a continuous seal of the trough sections for absolute fluidtight integrity of the duct.
Claim 3
Dependent Claim
34 words
Apparatus according to claim 1, wherein said first sealing strips extend along said sealing surfaces beyond said body portion of said gusset plate and are engaged by the sealing members on the trough covers.
Claim 4
Dependent Claim
36 words
Apparatus according to claim 1, wherein said gusset plate means has a body portion supported on and seated outwardly of the sealing surfaces and the projecting flange means is offset to reside under the trough covers.
Claim 5
Dependent Claim
32 words
Apparatus according to claim 3, wherein said gusset plate means has extending flanges engaging the upstanding sidewalls of the trough sections, thereby positioning said gusset plate means laterally of the trough sections.
Claim 6
Dependent Claim
40 words
Apparatus according to claim 4, wherein said extending flanges of said gusset plate means are notches notched to receive the flanges of adjacent trough sections and an interposed gasket, thereby positioning said gusset plate means longitudinally of the trough sections.
References Cited (Backward Citations)
US3003794A
Cited
US3370121A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |