US3418549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined numerical and torque control for a work and feed machine tool
Assignee: Rohr Inc
•
Filing: 1962-03-19
•
Granted: 1968-12-24
•
Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 Herff C Emerson
- 👤 Richard F Rieger
- 👤 Robert W Kitchin
- 👤 Verne E Vawter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:46
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/416; G05B19/4163; Y; Y10; Y10T; Y10T409/00; Y10T409/30; Y10T409/30084; Y10T409/301176; Y10T409/301624; Y10T409/30168
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN AN ENERGY-TORQUE CONTROLLED MACHINING SYSTEM, THE COMBINATION OF A CUTTING TOOL, A DRIVE MOTOR FOR SAID TOOL HAVING A FAMILY OF SPEED-TORQUE DROOP CHARACTERISTIC CURVES, MEANS FOR ADJUSTING THE OPERATING PARAMETERS OF SAID MOTOR TO PROVIDE SPEED AND TORQUE REQUIREMENTS IN RELATION TO SAID CURVES AND COMPATIBLE WITH THE MATERIAL YIELD CHARACTERISTICS OF A WORKPIECE TO BE MACHINED AND THEREBY FURTHER TO RENDER THE ENERGY SUPPLIED BY THE MACHINE SYSTEM COMPATIBLE WITH THE ENERGY REQUIRED FOR SAID MACHINING OF THE WORKPIECE, AND MEANS FOR ADJUSTING THE SLOPE OF SAID DROOP CHARACTERISTICS CURVES THEREBY TO RENDER THE SPEED SENSITIVITY OF THE MOTOR TO VARIATIONS IN THE MOTOR TORQUE COMPATIBLE WITH THE FULL RANGE OF CHANGES IN THE LOADING OF THE WORKPIECE ON THE CUTTING TOOL.
Claim 2
Dependent Claim
125 words
IN AN ENERGY-TORQUE CONTROLLED MACHINING SYSTEM, THE COMBINATION OF A CUTTING TOOL, A DRIVE MOTOR FOR SAID TOOL HAVING A FAMILY OF SPEED-TORQUE DROOP CHARACTERISTIC CURVES, MEANS FOR ADJUSTING THE OPERATING PARAMETERS OF SAID MOTOR TO PROVIDE SPEED AND TORQUE REQUIREMENTS IN RELATION TO SAID CURVES AND COMPATIBLE WITH THE MATERIAL YIELD CHARACTERISTICS OF A WORKPIECE TO BE MACHINED AND THEREBY FURTHER TO RENDER THE ENERGY SUPPLIED BY THE MACHINE SYSTEM COMPATIBLE WITH THE ENERGY REQUIRED FOR SAID MACHINING OF THE WORKPIECE, AND MEANS FOR ADJUSTING THE SLOPE OF SAID DROOP CHARACTERISTICS CURVES THEREBY TO RENDER THE SPEED SENSITIVITY OF THE MOTOR TO VARIATIONS IN THE MOTOR TORQUE COMPATIBLE WITH THE FULL RANGE OF CHANGES IN THE LOADING OF THE WORKPIECE ON THE CUTTING TOOL.
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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) | 1971-12-24 | 1972-06-24 | 1972-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-24 | 1976-06-24 | 1976-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-24 | 1980-06-24 | 1980-12-24 | $7700.00 | Window Closed / Lapsed |