Patent US728664A successfully refreshed from Google Patents.
Patent US3926533A successfully refreshed from Google Patents.
US3926533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manhole
Assignee: Individual
•
Filing: 1974-07-15
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Granted: 1975-12-16
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Expires: 1994-07-15
Abstract
Abstract System for adjusting the level of the upper edge of a manhole installed in a roadbed. The system comprises a first element mounted on the upper edge of a vertical housing embedded in the ground which upper edge arrives at a level below the level of the road surface, and a second element removably placed in the first element. Flexible adjusting elements are provided and each element is provided with a discontinuity in its whole thickness. The flexibility and the discontinuity of the adjusting elements permit these elements to bend for insertion in the space formed between an upper surface of the first element and a lower surface of the second element, when the second element is lifted by a predetermined value.
Inventors
- 👤 Andre Binette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:12
CPC Classifications
E; E02; E02D; E02D29/00; E02D29/12; E02D29/14; E02D29/1409
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
161 words
A system for adjusting the level of the upper edge of a manhole installed in a roadbed, comprising: a vertical housing, adapted to be embedded in the ground, with an upper edge at a level below the level of the roadbed surface; a first element removably mounted on the upper edge of said vertical housing; a second element removably placed within said first element; a flexible adjusting element, removably placed within said first element, inserted between an upper surface of said first element and a lower surface of said second element, being of a configuration having good resistance to compression forces, and provided with a cut in its whole thickness, said flexibility and said cut permitting said adjusting element to bend for said insertion between said first and second element as said second element is lifted a predetermined distance insufficient for complete removal from its place within said first element for adjusting the level of the upper edge of the manhole.
Claim 2
Independent Claim
161 words
A system for adjusting the level of the upper edge of a manhole installed in a roadbed, comprising: a vertical housing, adapted to be embedded in the ground, with an upper edge at a level below the level of the roadbed surface; a first element removably mounted on the upper edge of said vertical housing; a second element removably placed within said first element; a flexible adjusting element, removably placed within said first element, inserted between an upper surface of said first element and a lower surface of said second element, being of a configuration having good resistance to compression forces, and provided with a cut in its whole thickness, said flexibility and said cut permitting said adjusting element to bend for said insertion between said first and second element as said second element is lifted a predetermined distance insufficient for complete removal from its place within said first element for adjusting the level of the upper edge of the manhole.
Claim 3
Dependent Claim
17 words
A system according to claim 1 wherein said flexible adjusting element is accessible from within the manhole.
Claim 4
Dependent Claim
45 words
A system according to claim 1, wherein said flexible adjusting element has a W-shaped form and is provided with transverse braces between walls of the W-shape for ensuring the rigidity of the flexible adjusting element, said flexible adjusting element being made of a plastic material.
Claim 5
Dependent Claim
19 words
A system according to claim 1, wherein said flexible adjusting element is formed of a thin plate of plastic.
Claim 6
Dependent Claim
62 words
A system according to claim 1, including at least a second flexible adjusting element of different form and thicknesses from the first flexible adjusting element, each of said flexible adjusting elements being provided with grooves on one of its faces and projections on the other of its faces in such a way that two superposed flexible adjusting elements fit into each other.
Claim 7
Dependent Claim
77 words
A system according to claim 1, including an additional flexible adjusting element between said vertical housing and said first element and wherein sealing rings are provided between two superposed flexible adjusting elements for ensuring the sealing of the assembly, said sealing rings also being provided between said flexible adjusting element and the upper edge of said vertical housing and between said flexible adjusting elements and the upper and lower faces of said first and second elements respectively.
Claim 8
Independent Claim
210 words
A system for adjusting the level of the upper edge of a manhole installed in a roadbed, comprising: a vertical housing, adapted to be embedded in the ground, with an upper edge at a level below the level of the roadbed surface; a first element, removably mounted on the upper edge of said vertical housing, with an L-shaped form which has a horizontal arm directed towards the inside of the manhole; a second element removably placed within said first element and seated on said horizontal arm; a support ring secured on said horizontal arm; connecting means passing through apertures in said support ring and lugs in said second element for securing said second element to said first element; a flexible adjusting element, removably placed within said first element and inserted between an upper surface of said first element and a lower surface of said second element, said flexible adjusting element being provided with a cut in its whole thickness, said flexibility and said cut permitting said adjusting element to bend for said insertion between said first and second elements as said second element is lifted a predetermined distance insufficient for complete removal from its place within said first element for adjusting the level of the upper edge of the manhole.
Claim 9
Independent Claim
210 words
A system for adjusting the level of the upper edge of a manhole installed in a roadbed, comprising: a vertical housing, adapted to be embedded in the ground, with an upper edge at a level below the level of the roadbed surface; a first element, removably mounted on the upper edge of said vertical housing, with an L-shaped form which has a horizontal arm directed towards the inside of the manhole; a second element removably placed within said first element and seated on said horizontal arm; a support ring secured on said horizontal arm; connecting means passing through apertures in said support ring and lugs in said second element for securing said second element to said first element; a flexible adjusting element, removably placed within said first element and inserted between an upper surface of said first element and a lower surface of said second element, said flexible adjusting element being provided with a cut in its whole thickness, said flexibility and said cut permitting said adjusting element to bend for said insertion between said first and second elements as said second element is lifted a predetermined distance insufficient for complete removal from its place within said first element for adjusting the level of the upper edge of the manhole.
Claim 10
Dependent Claim
11 words
System according to claim 7, wherein the connecting means are bolts.
Claim 11
Dependent Claim
11 words
System according to claim 7, wherein the connecting means are staples.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |