Patent US3332610A successfully refreshed from Google Patents.
US3332610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal with cooling means
Assignee: Welch Scientific Co
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Filing: 1965-09-08
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Granted: 1967-07-25
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Expires: 1985-09-08
Abstract
No abstract record available.
Inventors
- 👤 Gordon E Osterstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:47
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/36; F16J15/363; Y; Y10; Y10S; Y10S277/00; Y10S277/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN COMBINATION, A TURBO-MOLECULAR PUMP AND A DRIVING AND SEALING MEANS THEREFOR, SAID TURBO-MOLECULAR PUMP HAVING A HOUSING, A SHAFT PROJECTING FROM SAID HOUSING, A TURBINE WHEEL MOUNTED ON SAID SHAFT FOR ROTATIONALLY DRIVING THE SAME, SAID TURBINE WHEEL HAVING A PLURALITY OF BLADE MEANS DISPOSED AROUND A PERIPHERAL PORTION THEREOF AND HAVING A GENERALLY RADIALLY EXTENDING SURFACE FORMED AT ONE SIDE IMMEDIATELY ADJACENT SAID BLADE MEANS, A NOZZLE FOR DIRECTING FLUID ONTO SAID BLADE MEANS WHEREBY SAID SHAFT WILL BE ROTATED, SAID SEALING MEANS INCLUDING A STATIONARY FACE RING FLUIDTIGHTLY JOINED TO SAID HOUSING AND SEALINGLY CONTACTING SAID RADIALLY EXTENDING SURFACE ON A SEALING CIRCLE WHICH APPORXIMATES THAT OF SAID BLADE MEANS WHEREBY SAID FLUID EXPANDING IN THE REGION OF SAID BLADE MEANS WILL SIMULTANEOUSLY CAUSE COOLING OF SAID SEAL.
Claim 2
Dependent Claim
131 words
IN COMBINATION, A TURBO-MOLECULAR PUMP AND A DRIVING AND SEALING MEANS THEREFOR, SAID TURBO-MOLECULAR PUMP HAVING A HOUSING, A SHAFT PROJECTING FROM SAID HOUSING, A TURBINE WHEEL MOUNTED ON SAID SHAFT FOR ROTATIONALLY DRIVING THE SAME, SAID TURBINE WHEEL HAVING A PLURALITY OF BLADE MEANS DISPOSED AROUND A PERIPHERAL PORTION THEREOF AND HAVING A GENERALLY RADIALLY EXTENDING SURFACE FORMED AT ONE SIDE IMMEDIATELY ADJACENT SAID BLADE MEANS, A NOZZLE FOR DIRECTING FLUID ONTO SAID BLADE MEANS WHEREBY SAID SHAFT WILL BE ROTATED, SAID SEALING MEANS INCLUDING A STATIONARY FACE RING FLUIDTIGHTLY JOINED TO SAID HOUSING AND SEALINGLY CONTACTING SAID RADIALLY EXTENDING SURFACE ON A SEALING CIRCLE WHICH APPORXIMATES THAT OF SAID BLADE MEANS WHEREBY SAID FLUID EXPANDING IN THE REGION OF SAID BLADE MEANS WILL SIMULTANEOUSLY CAUSE COOLING OF SAID SEAL.
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) | 1970-07-24 | 1971-01-23 | 1971-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-24 | 1975-01-23 | 1975-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-24 | 1979-01-23 | 1979-07-25 | $7700.00 | Window Closed / Lapsed |