US4440407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole cover gasket seal
Assignee: Individual
•
Filing: 1982-11-24
•
Granted: 1984-04-03
•
Expires: 2002-11-24
Abstract
Abstract A manhole cover gasket seal to seal a manhole cover in the opening of a manhole frame, the seal including a flat circular ring, an annular flange secured to the inner diameter of the ring and having a diameter substantially equal to the diameter in the opening of the manhole frame and a bead formed around the top of the ring and projecting slightly above the ring, the ring, flange and bead being formed as an integral unit of a resilient elastomeric material.
Inventors
- 👤 Michael Gagas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:26
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/149; F; F16; F16J; F16J15/00; F16J15/02; F16J15/06; F16J15/10; F16J15/104; F16J15/106
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
139 words
The combination of a manhole frame having a circular opening and a recess around the opening forming a manhole cover seat, and a manhole cover positioned on said seat, the improvement comprising a manhole cover gasket seal for sealing the manhole cover in the recess of the manhole frame, said seal comprising a first annular section having an inner diameter substantially equal to the diameter of the opening in the manhole frame and a second annular section having an outer diameter substantially equal to the diameter of the opening in the manhole frame, said second section being secured to said first section, whereby said first section forms a seal between the manhole cover and the seat around the opening in the frame and said second section holds the first section in position around the opening in the manhole frame.
Claim 2
Dependent Claim
139 words
The combination of a manhole frame having a circular opening and a recess around the opening forming a manhole cover seat, and a manhole cover positioned on said seat, the improvement comprising a manhole cover gasket seal for sealing the manhole cover in the recess of the manhole frame, said seal comprising a first annular section having an inner diameter substantially equal to the diameter of the opening in the manhole frame and a second annular section having an outer diameter substantially equal to the diameter of the opening in the manhole frame, said second section being secured to said first section, whereby said first section forms a seal between the manhole cover and the seat around the opening in the frame and said second section holds the first section in position around the opening in the manhole frame.
Claim 3
Dependent Claim
18 words
The combination according to claim 1 wherein said first and second sections are formed as an integral unit.
Claim 4
Dependent Claim
21 words
The combination according to claim 1 or 2 including a resilient bead formed around the upper surface of said first section.
Claim 5
Dependent Claim
19 words
The combination according to claim 1 including means for securing the first and second sections to the manhole frame.
Claim 6
Dependent Claim
171 words
The combination of a manhole frame having a circular frame and a recess in the frame around the opening to form a cover seat, and a manhole cover adapted to be placed in said recess on said seat, the improvement comprising a manhole cover gasket seal for sealing a manhole cover in the opening in a manhole frame to prevent the flow of water into the manhole, said seal comprising a flat resilient ring having an inner diameter substantially equal to the inner diameter of the opening in the manhole frame and a resilient annular flange having an outer diameter substantially equal to the diameter of the opening in said manhole frame, said flange being secured to the inner diameter of said ring and depending therefrom into the opening in said manhole frame when the gasket seal is placed on the cover seat around the opening in the manhole frame whereby the weight of the manhole cover on the ring will form a seal around the opening in the manhole frame.
Claim 7
Dependent Claim
171 words
The combination of a manhole frame having a circular frame and a recess in the frame around the opening to form a cover seat, and a manhole cover adapted to be placed in said recess on said seat, the improvement comprising a manhole cover gasket seal for sealing a manhole cover in the opening in a manhole frame to prevent the flow of water into the manhole, said seal comprising a flat resilient ring having an inner diameter substantially equal to the inner diameter of the opening in the manhole frame and a resilient annular flange having an outer diameter substantially equal to the diameter of the opening in said manhole frame, said flange being secured to the inner diameter of said ring and depending therefrom into the opening in said manhole frame when the gasket seal is placed on the cover seat around the opening in the manhole frame whereby the weight of the manhole cover on the ring will form a seal around the opening in the manhole frame.
Claim 8
Dependent Claim
17 words
The combination according to claim 5 wherein said ring and flange are formed as an integral unit.
Claim 9
Dependent Claim
37 words
The combination according to claim 5 or 6 including a resilient bead formed around the top of said ring and projecting slightly above the surface of said ring to engage the under surface of the manhole cover.
Claim 10
Dependent Claim
18 words
The combination according to claim 7, wherein said bead is formed as an integral part of said ring.
Claim 11
Dependent Claim
18 words
The combination according to claim 8 wherein said ring, flange and bead are formed from an elastomeric material.
References Cited (Backward Citations)
US696183A
Cited
US3147014A
Cited
US3199879A
Cited
US3355057A
Cited
US3406409A
Cited
US3979130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |