Patent US4050839A successfully refreshed from Google Patents.
US4050839A
Expired / Lapsed
US
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Process for raising manholes
Assignee: Individual
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Filing: 1976-08-27
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Granted: 1977-09-27
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Expires: 1996-08-27
Abstract
Abstract A process for raising manholes and manhole covers to a new grade level of a street when constructing new streets or when paving old streets, comprising the steps of placing a sealing means around the interior of the cast manhole between the lower edge thereof and the upper edge of a sewer catch basin, and pouring wet concrete around the exterior of manhole, the sealing means, and the upper edge of the sewer catch basin to form a continuous joint between the manhole at the raised grade level and the upper edge of the sewer catch basin, and removing the sealing means from between the edges of the manhole and sewer catch basin.
Inventors
- 👤 Ronald D. Vollmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:52
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/1409
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
A process for supporting a manhole frame and obtaining a seal between a manhole frame and a sewer catch basin, comprising the steps of: a. positioning a manhole frame in a desired position relative to an opening in a sewer catch basin; b. placing a flexible, resilient, air tight expandable means within the interior opening of the manhole frame and catch basin opening against the inner surfaces of said manhole frame and said sewer catch basin opening; c. inflating said expandable means to expand said expandable means into contact with the inner surfaces of said manhole frame and said sewer catch basin opening d. placing sealing and supporting material around the exterior of said expandable means in sealing and supporting contact with said manhole frame and said sewer catch basin; and, e. removing said expandable means from the interior of said sealing and supporting material, said manhole frame, and said sewer catch basin.
Claim 2
Dependent Claim
153 words
A process for supporting a manhole frame and obtaining a seal between a manhole frame and a sewer catch basin, comprising the steps of: a. positioning a manhole frame in a desired position relative to an opening in a sewer catch basin; b. placing a flexible, resilient, air tight expandable means within the interior opening of the manhole frame and catch basin opening against the inner surfaces of said manhole frame and said sewer catch basin opening; c. inflating said expandable means to expand said expandable means into contact with the inner surfaces of said manhole frame and said sewer catch basin opening d. placing sealing and supporting material around the exterior of said expandable means in sealing and supporting contact with said manhole frame and said sewer catch basin; and, e. removing said expandable means from the interior of said sealing and supporting material, said manhole frame, and said sewer catch basin.
References Cited (Backward Citations)
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Cited
US2166632A
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US3250190A
Cited
US3695153A
Cited
US3968600A
Cited
US3891337A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-26 | 1981-03-28 | 1981-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-26 | 1985-03-28 | 1985-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-26 | 1989-03-28 | 1989-09-27 | $7700.00 | Window Closed / Lapsed |