Patent US404196A successfully refreshed from Google Patents.
Patent US3240541A successfully refreshed from Google Patents.
US3240541A
Expired / Lapsed
US
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Temperature controlled hydrostatic spindle bearing
Assignee: Brown and Sharpe Manufacturing Co
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Filing: 1963-11-27
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Granted: 1966-03-15
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Expires: 1983-11-27
Abstract
No abstract record available.
Inventors
- 👤 George N Levesque
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:23
CPC Classifications
F; F16; F16C; F16C37/00; F16C37/002; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F16C32/0651; F16C35/00; F16C35/08; F16C35/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A TEMPERATURE CONTROLLED HYDROSTATIC BEARING FOR A SPINDLE ADAPTED TO BE DRIVEN AT DIFFERENT RATES HAVING, IN COMBINATION, A SPINDLE SUPPORTING BEARING SURFACE HAVING FORMED THEREIN HYDROSTATIC FLUID PRESSURE SUPPORTING POCKETS SPACED FROM ONE ANOTHER ABOUT SAID BEARING SURFACE, POCKET FORMING LANDS ENCLOSING EACH SAID POCKET, DRAINAGE CHANNELS FORMED IN SAID BEARING SURFACE OUTWARDLY OF SAID POCKET FORMING LANDS FOR DRAWING OFF HYDROSTATIC FLUID ESCAPING ACROSS SAID LANDS, A HYDROSTATIC FLUID PRESSRUE CIRCULATING SYSTEM COMPRISING SUPPLY CONNECTIONS THROUGH WHICH HYDROSTATIC FLUID IS SUPPLIED UNDER PRESSURE TO SAID POCKETS, SEPARATE SUPPLY CONNECTIONS THROUGH WHICH ADDITIONAL COOLING FLUID IS SUPPLIED TO SAID DRAINAGE CHANNELS, AND MEANS FOR PRECOOLING THE FLUID SUPPLIED TO EACH OF SAID POCKETS AND DRAINAGE CHANNELS.
Claim 2
Dependent Claim
117 words
A TEMPERATURE CONTROLLED HYDROSTATIC BEARING FOR A SPINDLE ADAPTED TO BE DRIVEN AT DIFFERENT RATES HAVING, IN COMBINATION, A SPINDLE SUPPORTING BEARING SURFACE HAVING FORMED THEREIN HYDROSTATIC FLUID PRESSURE SUPPORTING POCKETS SPACED FROM ONE ANOTHER ABOUT SAID BEARING SURFACE, POCKET FORMING LANDS ENCLOSING EACH SAID POCKET, DRAINAGE CHANNELS FORMED IN SAID BEARING SURFACE OUTWARDLY OF SAID POCKET FORMING LANDS FOR DRAWING OFF HYDROSTATIC FLUID ESCAPING ACROSS SAID LANDS, A HYDROSTATIC FLUID PRESSRUE CIRCULATING SYSTEM COMPRISING SUPPLY CONNECTIONS THROUGH WHICH HYDROSTATIC FLUID IS SUPPLIED UNDER PRESSURE TO SAID POCKETS, SEPARATE SUPPLY CONNECTIONS THROUGH WHICH ADDITIONAL COOLING FLUID IS SUPPLIED TO SAID DRAINAGE CHANNELS, AND MEANS FOR PRECOOLING THE FLUID SUPPLIED TO EACH OF SAID POCKETS AND DRAINAGE CHANNELS.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |