US3158970A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grinding workhead
Assignee: Heald Machine Co
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Filing: 1962-12-03
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Granted: 1964-12-01
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Expires: 1982-12-03
Abstract
No abstract record available.
Inventors
- 👤 George H Lockwood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:18
CPC Classifications
B; B24; B24B; B24B5/00; B24B5/35
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A GRINDING WORKHEAD FOR USE IN FINISHING A SURFACE OF REVOLUTION OF AN ANNULAR WORKPIECE, COMPRISING (A) A WORKHEAD BASE, (B) A SHOE FASTENED TO THE WORKHEAD AND HAVING A FIXED SURFACE ADAPTED TO CONTACT A FIRST PORTION OF THE OUTER SURFACE OF THE WORKPIECE, (C) A DISC MOUNTED ON THE WORKHEAD BASE FOR ROTATION ABOUT A FIXED AXIS AND DRIVEN TO PRESENT A MOVING PERIPHERAL SURFACE ADAPTED TO CONTACT THE OUTER SURFACE OF THE WORKPIECE AT A POSITION SUBSTANTIALLY SPACED FROM THE SAID FIRST PORTION, THE PERIPHERY OF THE DISC AT THE POSITION WHERE IT CONTACTS THE WORKPIECE TRAVELING IN THE DIRECTION AWAY FROM THE SHOE, AND (D) A PRESSURE MEMBER HAVING A FRICTION PORTION WHICH, DURING GRINDING, IS FIXED RELATIVE TO THE WORKHEAD BASE AND MOUNTED ON THE WORKHEAD BASE FOR MOVEMENT TOWARD AND AWAY FROM THE SHOE AND DISC, THE PRESSURE MEMBER BEING ADAPTED TO CONTACT A SECOND PORTION OF THE OUTER SURFACE OF THE WORKPIECE LOCATED IN SUCH A POSITION RELATIVE TO THE SAID FIRST PORTION AND THE SAID POSITION THAT THE WORKPIECE IS FIRMLY HELD IN PLACE, THE SAID FRICTION PORTION RESISTING ROTATION OF THE WORKPIECE TO PRODUCE A DIFFERENTIAL SPEED BETWEEN THE WORKPIECE AND THE WHEEL.
Claim 2
Dependent Claim
202 words
A GRINDING WORKHEAD FOR USE IN FINISHING A SURFACE OF REVOLUTION OF AN ANNULAR WORKPIECE, COMPRISING (A) A WORKHEAD BASE, (B) A SHOE FASTENED TO THE WORKHEAD AND HAVING A FIXED SURFACE ADAPTED TO CONTACT A FIRST PORTION OF THE OUTER SURFACE OF THE WORKPIECE, (C) A DISC MOUNTED ON THE WORKHEAD BASE FOR ROTATION ABOUT A FIXED AXIS AND DRIVEN TO PRESENT A MOVING PERIPHERAL SURFACE ADAPTED TO CONTACT THE OUTER SURFACE OF THE WORKPIECE AT A POSITION SUBSTANTIALLY SPACED FROM THE SAID FIRST PORTION, THE PERIPHERY OF THE DISC AT THE POSITION WHERE IT CONTACTS THE WORKPIECE TRAVELING IN THE DIRECTION AWAY FROM THE SHOE, AND (D) A PRESSURE MEMBER HAVING A FRICTION PORTION WHICH, DURING GRINDING, IS FIXED RELATIVE TO THE WORKHEAD BASE AND MOUNTED ON THE WORKHEAD BASE FOR MOVEMENT TOWARD AND AWAY FROM THE SHOE AND DISC, THE PRESSURE MEMBER BEING ADAPTED TO CONTACT A SECOND PORTION OF THE OUTER SURFACE OF THE WORKPIECE LOCATED IN SUCH A POSITION RELATIVE TO THE SAID FIRST PORTION AND THE SAID POSITION THAT THE WORKPIECE IS FIRMLY HELD IN PLACE, THE SAID FRICTION PORTION RESISTING ROTATION OF THE WORKPIECE TO PRODUCE A DIFFERENTIAL SPEED BETWEEN THE WORKPIECE AND THE WHEEL.
References Cited (Backward Citations)
US2050482A
Cited
US2329301A
Cited
US2379281A
Cited
US2758427A
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US2784534A
Cited
US2838886A
Cited
US2838887A
Cited
US2915855A
Cited
US2927408A
Cited
US3023552A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |