US4449715A
Expired / Lapsed
US
⏱️ 0.0 years remaining
External manhole seal
Assignee: Individual
•
Filing: 1982-08-19
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Granted: 1984-05-22
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Expires: 2002-08-19
Abstract
Abstract An external manhole sealing assembly comprising a flexible sleeve spanning the joint between a manhole frame and a manhole casing, a frame adapter for forming a sealing surface for said sleeve, the sleeve being secured to the sealing surface on the adapter and to the manhole casing by mounting bands, the sleeve including sufficient flexibility to allow for heaving of the frame with respect to the casing.
Inventors
- 👤 Michael Gagas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:23
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; F; F16; F16J; F16J15/00; F16J15/02; F16J15/021
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
130 words
An external manhole sealing assembly comprising a flexible sleeve for spanning the joint between a manhole frame having a radially extending flange and a manhole casing, first means for forming a first seal between said sleeve and the flange of the manhole frame, said first means including a U-shaped circular band adapted to be mounted on the flange and a vertical flange extending upwardly from the band to form a sealing surface for said sleeve, and a compressible sealing strip located between the flange and the U-shaped band to seal the space between the band and the flange, and second means for forming a second seal between said sleeve and the exterior of said manhole casing, thereby forming a continuous seal about the joint between the frame and the casing.
Claim 2
Dependent Claim
130 words
An external manhole sealing assembly comprising a flexible sleeve for spanning the joint between a manhole frame having a radially extending flange and a manhole casing, first means for forming a first seal between said sleeve and the flange of the manhole frame, said first means including a U-shaped circular band adapted to be mounted on the flange and a vertical flange extending upwardly from the band to form a sealing surface for said sleeve, and a compressible sealing strip located between the flange and the U-shaped band to seal the space between the band and the flange, and second means for forming a second seal between said sleeve and the exterior of said manhole casing, thereby forming a continuous seal about the joint between the frame and the casing.
Claim 3
Dependent Claim
62 words
The manhole sealing device according to claim 1, wherein said U-shaped band includes a number of spacer strips provided on the inside surface of the U-shaped band to maintain a space for said compressible sealing strip between the U-shaped band and the flange, and a first circular mounting band for securing said flexible sleeve to the exterior surface of the vertical flange.
Claim 4
Dependent Claim
31 words
The manhole sealing device according to claim 1 or 2 wherein said second sealing means comprises a second mounting band adapted for securing the sleeve to the exterior of the casing.
Claim 5
Dependent Claim
21 words
The manhole sealing device according to claim 1 wherein said flexible sleeve includes means for expanding the length of the sleeve.
Claim 6
Dependent Claim
107 words
A manhole sealing assembly for externally sealing the joint between a manhole frame having a radially extending flange and a manhole casing, said assembly comprising means mounted on said flange for forming a sealing surface on the frame, a flexible sleeve spanning the joint between the frame and casing, said sleeve having one end encircling the sealing surface means and the other end encircling the casing, first means encircling said one end of the sleeve to form a seal between the sleeve and said sealing surface means, and second means encircling the other end of the sleeve to form a seal between the sleeve and the casing.
Claim 7
Dependent Claim
107 words
A manhole sealing assembly for externally sealing the joint between a manhole frame having a radially extending flange and a manhole casing, said assembly comprising means mounted on said flange for forming a sealing surface on the frame, a flexible sleeve spanning the joint between the frame and casing, said sleeve having one end encircling the sealing surface means and the other end encircling the casing, first means encircling said one end of the sleeve to form a seal between the sleeve and said sealing surface means, and second means encircling the other end of the sleeve to form a seal between the sleeve and the casing.
Claim 8
Dependent Claim
47 words
The assembly according to claim 5 wherein said sealing surface means comprises a frame adapter including a U-shaped band enclosing the outer edge of the frame flange, and a flange mounted on the outer periphery of the band and extending upwardly therefrom to form the sealing surface.
Claim 9
Dependent Claim
27 words
The assembly according to claim 5 wherein said sealing surface means comprises an annular flange formed as an integral part of the outer periphery of the frame.
Claim 10
Dependent Claim
22 words
The assembly according to claims 5, 6 or 7 wherein said flexible sleeve includes means for expanding the length of the sleeve.
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) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |