Double trunnion accessory for milling machines
Abstract
Abstract A MACHINE TOOL WORK SUPPORT HAVING A PAIR OF SPACED COLUMNS EACH ROTATABLY CARRYING A PAIR OF WORK SUPPORTING TRUNNIONS. THE TRUNNIONS OF ONE COLUMN ARE IN AXIAL ALIGNMENT WITH THE TRUNNIONS OF THE OTHER COLUMN SO THAT WORK PIECES MAY BE SUSPENDED BETWEEN THE ALIGNED TRUNNIONS FOR ROTATION THEREWITH TO PRESENT ALL SIDES OF THE WORK PIECES ABOUT THE AXES OF ROTATION TO THE MACHINE TOOL. EACH COLUMN HAS A SERVO MOTOR WHICH OPERATES THROUGH A PRELOADED BACKLASH FREE GEAR TRANSMISSION TO SYNCHRONOUSLY DRIVE THE TRUNNIONS OF THE RESPECTIVE COLUMN FOR PRECISELY POSITIONING THE WORK PIECES AT A DETERMINED ANGULAR ORIENTATION AND ALSO FOR ROTATING THE WORK PIECES DURING A MACHINING OPERATION TO PROVIDE AN AXIS OF MOTION IN ADDITION TO THE AXES OF MOTION OF THE MACHINE TOOL.
Inventors
- 👤 Calvin S Gladoske
Bibliographic Details
Claims Analysis
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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) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |