US3158965A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for grinding
Assignee: Heald Machine Co
•
Filing: 1962-10-08
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Granted: 1964-12-01
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Expires: 1982-10-08
Abstract
No abstract record available.
Inventors
- 👤 George H Lockwood
- 👤 Clifford G Menard
- 👤 Almon F Townsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:18
CPC Classifications
B; B24; B24B; B24B49/00; B24B49/02; B24B49/04; B24B19/00; B24B19/02; B24B19/06; B24B47/00; B24B47/02; B24B47/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
181 words
A GRINDING MACHINE FOR FINISHING THE SURFACE OF A TAPERED BORE OF A WORKPIECE, COMPRISING A WORKHEAD FOR SUPPORTING THE WORKPIECE AND ROTATING IT ABOUT THE AXIS OF THE BORE, A WHEELHEAD HAVING A ROTATABLE SPINDLE, A FIRST AND A SECOND ABRASIVE WHEEL MOUNTED ON THE SPINDLE IN SPACED RELATION, EACH WHEEL BEING LONGER THAN THE BORE, MEANS FOR FEEDING THE SPINDLE TRANSVERSELY TO BRING THE FIRST WHEEL INTO CONTACT WITH THE SURFACE OF THE BORE FOR A PLUNGE GRIND, MEANS FOR TERMINATING THE FEEDING BUT CONTINUING GRINDING BY THE FIRST WHEEL TO RELIEVE SPINDLE DEFLECTION, MEANS FOR ADVANCING THE SPINDLE LONGITUDINALLY TO BRING THE SECOND WHEEL INTO CONTACT WITH THE SURFACE OF THE BORE, MEANS FOR FEEDING THE SECOND WHEEL TRANSVERSELY FOR A FINISH GRIND, MEANS FOR CONTINUOUSLY GAGING THE BORE DURING THE FINISH GRIND, MEANS RESPONSIVE TO THE GAGING FOR REMOVING THE WHEELS FROM THE WORKPIECE, A LOADING MECHANISM OPERATIVE TO REPLACE THE WORKPIECE WITH ANOTHER WORKPIECE, A DRESSER, AND A CONTROL APPARATUS FOR RENDERING THE DRESSER OPERATIVE TO DRESS THE WHEELS ONLY WHILE THE LOADING MECHANISM IS OPERATIVE.
Claim 2
Dependent Claim
181 words
A GRINDING MACHINE FOR FINISHING THE SURFACE OF A TAPERED BORE OF A WORKPIECE, COMPRISING A WORKHEAD FOR SUPPORTING THE WORKPIECE AND ROTATING IT ABOUT THE AXIS OF THE BORE, A WHEELHEAD HAVING A ROTATABLE SPINDLE, A FIRST AND A SECOND ABRASIVE WHEEL MOUNTED ON THE SPINDLE IN SPACED RELATION, EACH WHEEL BEING LONGER THAN THE BORE, MEANS FOR FEEDING THE SPINDLE TRANSVERSELY TO BRING THE FIRST WHEEL INTO CONTACT WITH THE SURFACE OF THE BORE FOR A PLUNGE GRIND, MEANS FOR TERMINATING THE FEEDING BUT CONTINUING GRINDING BY THE FIRST WHEEL TO RELIEVE SPINDLE DEFLECTION, MEANS FOR ADVANCING THE SPINDLE LONGITUDINALLY TO BRING THE SECOND WHEEL INTO CONTACT WITH THE SURFACE OF THE BORE, MEANS FOR FEEDING THE SECOND WHEEL TRANSVERSELY FOR A FINISH GRIND, MEANS FOR CONTINUOUSLY GAGING THE BORE DURING THE FINISH GRIND, MEANS RESPONSIVE TO THE GAGING FOR REMOVING THE WHEELS FROM THE WORKPIECE, A LOADING MECHANISM OPERATIVE TO REPLACE THE WORKPIECE WITH ANOTHER WORKPIECE, A DRESSER, AND A CONTROL APPARATUS FOR RENDERING THE DRESSER OPERATIVE TO DRESS THE WHEELS ONLY WHILE THE LOADING MECHANISM IS OPERATIVE.
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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) | 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 |