US3076656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic seal especially for pumps, compressors and turbines
Assignee: JM Voith GmbH
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Filing: 1960-12-23
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Granted: 1963-02-05
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Expires: 1980-12-23
Abstract
No abstract record available.
Inventors
- 👤 Hofmann Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/002; F16J15/008; F01; F01D; F01D11/00; F01D11/02; F01D11/04; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F16J15/16; F16J15/40; F16J15/406
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
124 words
IN A HYDRODYNAMIC SEALING ARRANGEMENT, ESPECIALLY FOR THE SHAFTS OF PUMPS, COMPRESSORS, AND TURBINES: A FIRST MACHINE MEMBER HAVING AN OPENING THEREIN, A SECOND MACHINE MEMBER EXTENDING THROUGH SAID OPENING AND CONFINING WITH SAID FIRST MACHINE MEMBER A PASSAGE TO BE SEALED, AN ANNULAR INTERMEDIATE MEMBER INTERPOSED BETWEEN SAID FIRST AND SAID SECOND MACHINE MEMBER NEAR SAID PASSAGE TO BE SEALED AND CONFINING WITH SAID MACHINE MEMBERS AN INNER AND AN OUTER SEALING GAP RESPECTIVELY, EACH OF SAID SEALING GAPS BEING AT LEAST PARTLY CONFINED BY WALL PORTIONS OF SAID MACHINE MEMBERS AND OF SAID INTERMEDIATE MEMBER, SAID WALL PORTIONS HAVING TWO HELICAL GROOVES THEREIN WITH OPPOSITE DIRECTION, AND DRIVING MEANS CAUSING RELATIVE SPEED BETWEEN SAID INTERMEDIATE MEMBER AND EACH OF SAID MACHINE MEMBERS.
Claim 2
Dependent Claim
124 words
IN A HYDRODYNAMIC SEALING ARRANGEMENT, ESPECIALLY FOR THE SHAFTS OF PUMPS, COMPRESSORS, AND TURBINES: A FIRST MACHINE MEMBER HAVING AN OPENING THEREIN, A SECOND MACHINE MEMBER EXTENDING THROUGH SAID OPENING AND CONFINING WITH SAID FIRST MACHINE MEMBER A PASSAGE TO BE SEALED, AN ANNULAR INTERMEDIATE MEMBER INTERPOSED BETWEEN SAID FIRST AND SAID SECOND MACHINE MEMBER NEAR SAID PASSAGE TO BE SEALED AND CONFINING WITH SAID MACHINE MEMBERS AN INNER AND AN OUTER SEALING GAP RESPECTIVELY, EACH OF SAID SEALING GAPS BEING AT LEAST PARTLY CONFINED BY WALL PORTIONS OF SAID MACHINE MEMBERS AND OF SAID INTERMEDIATE MEMBER, SAID WALL PORTIONS HAVING TWO HELICAL GROOVES THEREIN WITH OPPOSITE DIRECTION, AND DRIVING MEANS CAUSING RELATIVE SPEED BETWEEN SAID INTERMEDIATE MEMBER AND EACH OF SAID MACHINE MEMBERS.
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) | 1966-02-04 | 1966-08-06 | 1967-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-02-04 | 1970-08-06 | 1971-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-02-04 | 1974-08-06 | 1975-02-05 | $7700.00 | Window Closed / Lapsed |