Patent US4174750A successfully refreshed from Google Patents.
US4174750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tube cleaner having anchored rotatable spiral member
Assignee: Individual
•
Filing: 1978-04-18
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Granted: 1979-11-20
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Expires: 1998-04-18
Abstract
Abstract A spirally configured member, rotatably positioned within an elongated tube, the spiral member adapted to continuously clean the tube's interior wall when such member is caused to rotate. The spiral has one end rotatably anchored by a plug fixed to one upstream end of the tube and a swivel linking the plug and the spiral member.
Inventors
- 👤 Billy M. Nichols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:02
CPC Classifications
F; F28; F28G; F28G3/00; F28G3/08; B; B08; B08B; B08B9/00; B08B9/02; B08B9/027; B08B9/04; B08B9/043; B08B9/045
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
81 words
A tube cleaning device for use in a heat exchanger comprising: a plurality of tubes adapted to have a fluid pass therethrough; and rotatable means for preventing contaminant build-up on the interior wall provided each of said tubes, said rotatable means comprising a spiral having one end rotatably anchored by anchoring means to the upstream end of an associated tube, said anchoring means including a plug fixed to said upstream end and swivel means linking said plug and said rotatable means.
Claim 2
Dependent Claim
81 words
A tube cleaning device for use in a heat exchanger comprising: a plurality of tubes adapted to have a fluid pass therethrough; and rotatable means for preventing contaminant build-up on the interior wall provided each of said tubes, said rotatable means comprising a spiral having one end rotatably anchored by anchoring means to the upstream end of an associated tube, said anchoring means including a plug fixed to said upstream end and swivel means linking said plug and said rotatable means.
Claim 3
Dependent Claim
12 words
The device of claim 1 wherein said plug is of venturi configuration.
References Cited (Backward Citations)
US525932A
Cited
US304470A
Cited
US710798A
Cited
US812361A
Cited
US1783844A
Cited
US2310234A
Cited
US2943845A
Cited
US3086372A
Cited
US3407871A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-11-19 | 1983-05-21 | 1983-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-11-19 | 1987-05-21 | 1987-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-11-19 | 1991-05-21 | 1991-11-20 | $7700.00 | Window Closed / Lapsed |