US4501258A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Kerf loss reduction in internal diameter sawing
Assignee: Texas Instruments Inc
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Filing: 1982-10-04
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Granted: 1985-02-26
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Expires: 2002-10-04
Abstract
Abstract A system and method for reducing kerf loss and controlling the tension and lateral vibration of an internal diameter saw blade by controlling the temperature of the blade while it is still rotating. The blade temperature is controlled by regulating the temperature of the cutting fluid flow associated therewith. In one embodiment blade tension is periodically measured and, when the tension falls below a predetermined limit, the temperature of the cutting fluid stream is decreased for a period of time until the tension increases to a preselected value.
Inventors
- 👤 Lawrence D. Dyer
- 👤 Anderson D. McGregor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:48
CPC Classifications
B; B23; B23Q; B23Q11/00; B23Q11/14; B23Q11/145; B23D; B23D47/00; B23D47/005; B23D59/00; B23D59/02; B28; B28D; B28D5/00; B28D5/02; B28D5/022; B28D5/028
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
64 words
A method for controlling the tension of an internal diameter saw blade while sawing an object, comprising the steps of: directing a stream of fluid onto the cutting edge of said saw blade before said blade enters the object being sawed, wherein some of the fluid enters the cutting region; measuring the tension of said saw blade; and regulating the fluid temperature responsive thereto.
Claim 2
Independent Claim
64 words
A method for controlling the tension of an internal diameter saw blade while sawing an object, comprising the steps of: directing a stream of fluid onto the cutting edge of said saw blade before said blade enters the object being sawed, wherein some of the fluid enters the cutting region; measuring the tension of said saw blade; and regulating the fluid temperature responsive thereto.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein said regulating step comprises decreasing the temperature of said fluid until said saw blade tension is increased to a predetermined value.
Claim 4
Independent Claim
86 words
A system for controlling the tension of an internal diameter saw blade while sawing an object, comprising: means for directing a stream of fluid onto the cutting edge of said saw blade before said blade enters the object being sawed, whereby the fluid is carried into the cutting area; means for regulating the temperature of said fluid to control blade tension; and means for measuring the tension of said saw blade coupled to said regulating means, wherein said regulating means is responsive to said measuring means.
Claim 5
Independent Claim
86 words
A system for controlling the tension of an internal diameter saw blade while sawing an object, comprising: means for directing a stream of fluid onto the cutting edge of said saw blade before said blade enters the object being sawed, whereby the fluid is carried into the cutting area; means for regulating the temperature of said fluid to control blade tension; and means for measuring the tension of said saw blade coupled to said regulating means, wherein said regulating means is responsive to said measuring means.
Claim 6
Dependent Claim
31 words
The system of claim 3 wherein said regulating means comprises means for decreasing the temperature of said fluid until said saw blade tension is increased to within a predetermined tension range.
Claim 7
Dependent Claim
59 words
The system of claim 4, further comprising: control means coupled to said regulating means and to said measuring means for periodically enabling said measuring means to detect when the blade tension decreases to a value outside of said tension range, and thereafter enabling said regulating means until the blade tension increases to a value within said predetermined tension range.
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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) | 1988-02-26 | 1988-08-27 | 1989-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-26 | 1992-08-27 | 1993-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-26 | 1996-08-27 | 1997-02-26 | $7700.00 | Window Closed / Lapsed |