US4229121A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concrete removal apparatus
Assignee: SEA HORSE CORP
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Filing: 1977-11-17
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Granted: 1980-10-21
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Expires: 1997-11-17
Abstract
Abstract A tool is provided for removing concrete from underwater pipes which tool is comprised of a frame or member having two coaxially opposed concrete removal jets mounted thereon, whereby the opposing forces of the two jets cancel out the thrusting effect of one against the other to thereby provide a device which does not require massive rigid equipment to hold the jets or nozzles in place adjacent to the pipe.
Inventors
- 👤 Lee O. Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:43
CPC Classifications
F; F16; F16L; F16L1/00; F16L1/26; F16L1/265; B; B66; B66C; B66C17/00; B66C23/00; B66C23/54
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
A submarine concrete removal tool comprising a crescent carrying two coaxially opposed concrete removal jets and track means for said crescent for transporting said jets along pipe wherein said track means comprises a pipe lift means coaxial therewith for lifting and holding pipe above the sea floor.
Claim 2
Dependent Claim
47 words
A submarine concrete removal tool comprising a crescent carrying two coaxially opposed concrete removal jets and track means for said crescent for transporting said jets along pipe wherein said track means comprises a pipe lift means coaxial therewith for lifting and holding pipe above the sea floor.
Claim 3
Dependent Claim
47 words
A submarine concrete removal tool comprising a member carrying two coaxially opposed concrete removal jets and track means for said member for transporting said jets along pipe wherein said track means comprises a pipe lift means coaxial therewith for lifting and holding pipe above the sea floor.
Claim 4
Dependent Claim
47 words
A submarine concrete removal tool comprising a member carrying two coaxially opposed concrete removal jets and track means for said member for transporting said jets along pipe wherein said track means comprises a pipe lift means coaxial therewith for lifting and holding pipe above the sea floor.
References Cited (Backward Citations)
US293011A
Cited
US2823398A
Cited
FR1372743A
Cited
US3820184A
Cited
US3933519A
Cited
US4028903A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |