Patent US3568435A successfully refreshed from Google Patents.
Patent US3759280A successfully refreshed from Google Patents.
US3759280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pipe to manhole seal
Assignee: CHARDON RUBBER 373 WASHINGTON STREET CHARDON OH 44024 A CORP OF OH
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Filing: 1971-05-24
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Granted: 1973-09-18
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Expires: 1991-05-24
Abstract
Abstract A seal is here taught for use between a concrete side wall of a manhole installation and a pipe which penetrates through the side wall. Pipes for use in this service generally have rough cylindrical outer surfaces which are not truly round. The seal includes an elastomeric sleeve which is positioned about the outer surface of the pipe and which is clamped at one of its ends thereto. The sleeve is provided at its other end with an outwardly-flared flange. The flange may be attached to the wall by means of a firm annulus and bolts or the like. In a preferred embodiment the flange is cast into the wall and has corrugations to insure good bond therewith. The sleeve can be positioned within the hole, out of harms way, while the concrete wall is being poured.
Inventors
- 👤 H Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:53
CPC Classifications
F; F16; F16L; F16L41/00; F16L41/002; E; E02; E02D; E02D29/00; E02D29/12; E02D29/122; F16L5/00; F16L5/02; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6991
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
In combination a concrete manhole structure with a pipe having a generally cylindrically shaped outer surface and a circumferentially continuous elastomeric sleeve, the manhole structure having a wall provided with an opening through which a portion of the pipe is inserted, the sleeve having a first end pipe, clamped sealed relationship to the outer surface of the pipe, the sleeve having a second end with an outwardly flared flange formed thereon and projecting radially outwardly therefrom, the portion of said pipe within said opening being free of bearing contact with said sleeve, means for attaching the flange in sealed engagement to the wall and concentric with said opening.
Claim 2
Dependent Claim
108 words
In combination a concrete manhole structure with a pipe having a generally cylindrically shaped outer surface and a circumferentially continuous elastomeric sleeve, the manhole structure having a wall provided with an opening through which a portion of the pipe is inserted, the sleeve having a first end pipe, clamped sealed relationship to the outer surface of the pipe, the sleeve having a second end with an outwardly flared flange formed thereon and projecting radially outwardly therefrom, the portion of said pipe within said opening being free of bearing contact with said sleeve, means for attaching the flange in sealed engagement to the wall and concentric with said opening.
Claim 3
Dependent Claim
68 words
The combination of claim 1 with the means for attaching the flange in sealed engagement to the wall comprising: the flange formed with an outer margin having a continuous thickened rim, a rigid annulus engageable over the outer margin and having a continuous bearing surface which compresses the thickened rim, a plurality of bolts connected between the annulus and the wall for drawing the annulus to the wall.
Claim 4
Dependent Claim
83 words
In combination a concrete manhole structure with a pipe having a generally cylindrically shaped outer surface and an elastomeric sleeve, the manhole structure having a wall provided with an opening through which the pipe is inserted, the sleeve having a first end in clamped sealed relationship to the outer surface of the pipe, the sleeve having a second end with an outwardly flared flange formed thereon and projecting radially outward therefrom, the flange sealably cast into the concrete wall concentric with the opening.
Claim 5
Dependent Claim
83 words
In combination a concrete manhole structure with a pipe having a generally cylindrically shaped outer surface and an elastomeric sleeve, the manhole structure having a wall provided with an opening through which the pipe is inserted, the sleeve having a first end in clamped sealed relationship to the outer surface of the pipe, the sleeve having a second end with an outwardly flared flange formed thereon and projecting radially outward therefrom, the flange sealably cast into the concrete wall concentric with the opening.
Claim 6
Dependent Claim
21 words
The seal of claim 3 and the flange provided with corrugations to improve its bond and seal to the concrete wall.
Claim 7
Dependent Claim
122 words
In combination a concrete manhole structure with a pipe having a generally cylindrically shaped outer surface and a sleeve, the manhole structure having a wall provided with an opening through which the pipe is inserted, the sleeve having a first end in clamped sealed relationship to the outer surface of the pipe, the sleeve having a second end with an outwardly flared flange formed thereon and projecting radially outwardly therefrom so that the flange can be sealably cast into the concrete wall conceNtric with the opening, the sleeve made of an elastomeric material whereby it can be positioned within the opening while the wall is being poured, the flange provided with corrugations to improve its bond and seal to the concrete wall.
Claim 8
Dependent Claim
122 words
In combination a concrete manhole structure with a pipe having a generally cylindrically shaped outer surface and a sleeve, the manhole structure having a wall provided with an opening through which the pipe is inserted, the sleeve having a first end in clamped sealed relationship to the outer surface of the pipe, the sleeve having a second end with an outwardly flared flange formed thereon and projecting radially outwardly therefrom so that the flange can be sealably cast into the concrete wall conceNtric with the opening, the sleeve made of an elastomeric material whereby it can be positioned within the opening while the wall is being poured, the flange provided with corrugations to improve its bond and seal to the concrete wall.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |