Patent US4268598A successfully refreshed from Google Patents.
Patent US3308695A successfully refreshed from Google Patents.
US3308695A
Expired / Lapsed
US
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Apparatus for machining a helical element
Assignee: Robbins and Myers Inc
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Filing: 1964-09-16
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Granted: 1967-03-14
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Expires: 1984-09-16
Abstract
No abstract record available.
Inventors
- 👤 Gilbert H Hagerman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:54
CPC Classifications
B; B23; B23B; B23B5/00; B23B5/36; B23B5/46; Y; Y10; Y10T; Y10T82/00; Y10T82/14; Y10T82/20; Y10T82/25; Y10T82/2527
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
IN AN APPARATUS FOR MACHINING AN ELONGATED, RODLIKE WORKPIECE, TO CREATE THEREFROM A HELICAL ELEMENT HAVING A CIRCULAR CROSS SECTION NORMAL TO ITS AXIS AT ANY POINT ALONG ITS LENGTH, SAID APPARATUS COMPRISING A CHUCK, ROTATABLY MOUNTED ON ONE AXIS, FOR HOLDING SAID WORKPIECE BY ONE END, A CUTTER HEAD ROTATABLY MOUNTED ON ANOTHER AXIS, DISPLACED FROM SAID ONE AXIS, AND CONTAINING A PLURALITY OF CUTTING ELEMENTS RADIALLY DISPOSED THEREIN WITH THEIR CUTTING EDGES INWARDLY DIRECTED, MEANS FOR ROTATING SAID CUTTER HEAD AT RELATIVELY HIGH SPEED, A FIXED WORK SUPPORT FOR SAID WORKPIECE IMMEDIATELY ADJACENT
Claim 2
Dependent Claim
95 words
IN AN APPARATUS FOR MACHINING AN ELONGATED, RODLIKE WORKPIECE, TO CREATE THEREFROM A HELICAL ELEMENT HAVING A CIRCULAR CROSS SECTION NORMAL TO ITS AXIS AT ANY POINT ALONG ITS LENGTH, SAID APPARATUS COMPRISING A CHUCK, ROTATABLY MOUNTED ON ONE AXIS, FOR HOLDING SAID WORKPIECE BY ONE END, A CUTTER HEAD ROTATABLY MOUNTED ON ANOTHER AXIS, DISPLACED FROM SAID ONE AXIS, AND CONTAINING A PLURALITY OF CUTTING ELEMENTS RADIALLY DISPOSED THEREIN WITH THEIR CUTTING EDGES INWARDLY DIRECTED, MEANS FOR ROTATING SAID CUTTER HEAD AT RELATIVELY HIGH SPEED, A FIXED WORK SUPPORT FOR SAID WORKPIECE IMMEDIATELY ADJACENT
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |