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US3355788A
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A method of sawing slits in finned tubing
Assignee: Hudson Engineering Corp
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Filing: 1964-10-20
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Granted: 1967-12-05
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Expires: 1984-10-20
Abstract
No abstract record available.
Inventors
- 👤 Addison Y Gunter
- 👤 Thomas E Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 19:55
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; B21C; B21C37/00; B21C37/06; B21C37/15; B21C37/22; B23; B23C; B23C3/00; B23C3/28; B23C3/30; B23D; B23D45/00; B23D45/12; B23D45/122; Y; Y10; Y10S; Y10S83/00; Y10S83/929; Y10S83/952; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49377; Y10T29/49378; Y10T83/00; Y10T83/02; Y10T83/0304; Y10T83/0311
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A PROCESS FOR SLITTING FINNED TUBING, WHICH COMPRISES THE STEPS OF PASSING FINNED TUBING IN AN AXIAL DIRECTION THROUGH AN ASSEMBLY OF ROTARY SAWS, SAID TUBING HAVING A SERIES OF EXTRUDED ALUMINUM FINS 5/8-INCH WIDE AND 0.016 INCH THICK THEREON SUPPORTED ONLY BY THE TUBING; AND THEREIN SAWING SLITS IN EACH FIN BY CONTROLLING THE SPEED OF MOVEMENT OF THE SAWS RELATIVE TO SPEED OF MOVEMENT OF THE TUBING TO PROVIDE AN AVERAGE SAW TOOTH CUT PER IMPACT IN THE RANGE FROM 0.02 INCH TO 0.003 INCH ACCORDING TO THE FOLLOWING EQUATION:
Claim 2
Dependent Claim
92 words
A PROCESS FOR SLITTING FINNED TUBING, WHICH COMPRISES THE STEPS OF PASSING FINNED TUBING IN AN AXIAL DIRECTION THROUGH AN ASSEMBLY OF ROTARY SAWS, SAID TUBING HAVING A SERIES OF EXTRUDED ALUMINUM FINS 5/8-INCH WIDE AND 0.016 INCH THICK THEREON SUPPORTED ONLY BY THE TUBING; AND THEREIN SAWING SLITS IN EACH FIN BY CONTROLLING THE SPEED OF MOVEMENT OF THE SAWS RELATIVE TO SPEED OF MOVEMENT OF THE TUBING TO PROVIDE AN AVERAGE SAW TOOTH CUT PER IMPACT IN THE RANGE FROM 0.02 INCH TO 0.003 INCH ACCORDING TO THE FOLLOWING EQUATION:
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |