US3385009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spindle bearings
Assignee: Landis Tool Co
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Filing: 1964-02-03
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Granted: 1968-05-28
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Expires: 1984-02-03
Abstract
No abstract record available.
Inventors
- 👤 Lueders Willi Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:16
CPC Classifications
F; F16; F16C; F16C35/00; F16C35/08; F16C35/10; B; B24; B24B; B24B41/00; B24B41/04; F16C2322/00; F16C2322/39
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
143 words
IN COMBINATION, A BEARING, A GRINDING WHEEL SPINDLE ROTATABLY SUPPORTED IN SAID BEARING, (A) A GRINDING WHEEL ON SAID SPINDLE, (B) PERIPHERALLY SPACED GROOVES DEFINING PERIPHERALLY SPACED HYDRODYNAMIC BEARING ELEMENTS IN THE PORTION OF SAID BEARING ADJACENT A WORKPIECE FOR DETERMINING THE NORMAL RADIAL POSITION OF SAID SPINDLE, (C) MEANS FOR PERMITTING SAID SPINDLE TO YIELD RADIALLY WHEN OUT OF ROUND PORTIONS OF A WORKPIECE ENGAGE SAID GRINDING WHEEL COMPRISING (D) A SECOND PORTION OF SAID BEARING SUBSTANTIALLY OPPOSITE TO SAID FIRST PORTION AND HAVING AT LEAST ONE HYDROSTATIC BEARING ELEMENT, (E) MEANS FOR CIRCULATING LUBRICANT THROUGH SAID GROOVES, (F) MEANS TO SUPPLY LUBRICANT UNDER PRESSURE TO SAID HYDROSTATIC BEARING ELEMENT TO URGE SAID SPINDLE AGAINST SAID PERIPHERALLY SPACED HYDRODYNAMIC BEARING ELEMENTS, (G) SAID HYDROSTATIC PRESSURE BEING LESS THAN THAT EXERTED ON THE SPINDLE BY SAID OUT OF ROUND PORTIONS OF SAID WORKPIECE.
References Cited (Backward Citations)
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FR1028027A
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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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |