Patent US3562836A successfully refreshed from Google Patents.
US3562836A
Expired / Lapsed
US
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Reaming tool
Assignee: Individual
•
Filing: 1968-12-30
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Granted: 1971-02-16
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Expires: 1988-12-30
Abstract
Abstract A REAMING TOO FOR REAMING THE INTERNAL SURFACE OF A PIPE COMPRISES A ROTARY REAMING HEAD MOUNTED AT ONE END OF A CYLINDRICAL HOUSING IN WHICH A MOTOR FOR DRIVING THE REAMING HEAD IS MOUNTED. A PLURALITY OF ENDLESS TRACKS MOUNTED EXTERNALLY OF THE HOUSING AND EXTENDING ALONG THE SIDES THEREOF ARE PROVIDED WITH FRICTION PADS, WHICH ENGAGE THE INNER SURFACE OF THE PIPE TO PREVENT ROTATION OF THE HOUSING WITHIN THE PIPE. THE REAMING TOOL IS DRAWN THROUGH THE PIPE BY MEANS OF A TOW CABLE CONNECTED TO A SWIVEL COUPLING MOUNTED ON THE REAMING HEAD.
Inventors
- 👤 James Mcghee Frew
- 👤 Raymond Muir Bremner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:54
CPC Classifications
F; F16; F16L; F16L55/00; F16L55/26; F16L55/28; F16L55/30; F16L55/38; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/047; B08B9/049; E; E03; E03F; E03F9/00; E03F9/002
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |