Patent US3621614A successfully refreshed from Google Patents.
US3621614A
Expired / Lapsed
US
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Cam grinding machine
Assignee: Toyoda Koki KK
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Filing: 1968-12-23
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Granted: 1971-11-23
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Expires: 1988-12-23
Abstract
Abstract A CAM GRINDING MACHINE FOR GRINDING A CAM ON A WORKPIECE WHILE COPYING OR DUPLICATING A MASTER CAM. THE MACHINE IS EQUIPPED WITH AN APPARATUS FOR SUBSTANTIALLY COMPENSATING LIFT ERROR ON A WORKPIECE DUE TO GRINDING WHEEL WEAR, SAID APPARATUS BEING PROVIDED WITH A PLURALITY OF CAM ROLLERS HAVING DIFFERENT DIAMETERS INCLUDING A CAM ROLLER WHICH ENGAGES WITH A MASTER CAM OR MASTER CAMS, SAID CAM ROLLERS BEING AUTOMATICALLY OR MANUALLY CHANGED WHEN THE GRINDING WHEEL DIAMETER IS REDUDED BY A PREDETERMINED EXTENT, WHEREBY THE LIFT ERROR ON THE WORKPIECE IS SUBSTANTIALLY COMPENSATED.
Inventors
- 👤 Ryotaro Hikita
- 👤 Riichi Takahashi
- 👤 Rokuro Kimura
- 👤 Mikishi Kurimoto
- 👤 Teruyuki Ito
- 👤 Sadamu Kato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:54
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/08; B24B19/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
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 |