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Patent US3247620A successfully refreshed from Google Patents.
US3247620A
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US
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Multiple position feed mechanism
Assignee: Landis Tool Co
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Filing: 1963-11-15
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Granted: 1966-04-26
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Expires: 1983-11-15
Abstract
No abstract record available.
Inventors
- 👤 William E Happel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:45
CPC Classifications
B; B24; B24B; B24B47/00; B24B47/20; B24B19/00; B24B19/08; B24B19/12; B24B47/02; B24B47/04; B24B47/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
120 words
IN A GRINDING MACHINE FOR GRINDING AXIALLY SPACED PORTIONS OF A WORKPIECE, A WORK SUPPORT, A GRINDING WHEEL SUPPORT, A GRINDING WHEEL ROTATABLY MOUNTED ON SAID WHEEL SUPPORT, A FEED MECHANISM FOR MOVING SAID WHEEL SUPPORT TOWARD AND FROM SAID WORK SUPPORT COMPRISING A FEED SCREW, A SCREW ENGAGING MEMBER ON SAID WHEEL SUPPORT IN OPERATIVE RELATION WITH SAID FEED SCREW, MEANS TO MOVE SAID FEED SCREW TO ADVANCE SAID WHEEL SUPPORT TO GRIND A WORKPIECE PORTION TO A PREDETERMINED DIAMETER, AND MEANS OPERABLE AUTOMATICALLY TO CHANGE THE RELATION BETWEEN SAID FEED SCREW AND SAID WHEEL SUPPORT SO THAT WHEN SAID FEED SCREW IS MOVED, IT WILL ADVANCE SAID WHEEL SUPPORT TO GRIND A WORKPIECE PORTION TO A DIFFERENT DIAMETER.
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) | 1969-04-25 | 1969-10-25 | 1970-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-04-25 | 1973-10-25 | 1974-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-04-25 | 1977-10-25 | 1978-04-26 | $7700.00 | Window Closed / Lapsed |