US3273902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing of spindles
Assignee: Crane Process Flow Technologies Ltd
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Filing: 1963-06-25
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Granted: 1966-09-20
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Expires: 1983-06-25
Abstract
No abstract record available.
Inventors
- 👤 Billson Frederick William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:32
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/08; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16K41/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
164 words
A SEAL FOR SEALING AGAINST FLUID PRESSURE A SPINDLE TO A CASING IN RELATION TO WHICH IT MAKES A ROTATIONAL MOVEMENT ABOUT ITS AXIS, COMPRISING A CENTRALLY APERTURED ELASTIC AND FLEXIBLE DIAPHRAGM INCORPORATING A RIB AROUND THE EDGE OF ITS CENTRAL APERTURE, THE DIAPHRAGM IN ITS FREE CONDITION BEING SUBSTANTIALLY DISHED WITH A SLIGHT REVERSE CURVATURE IN THE ZONE WHICH RUNS INTO THE RIB, THE DIAMETER OF THE APERTURE BEING SLIGHTLY LESS THAN THAT OF THE SPINDLE WHEREBY THE RIB ENGAGES THE SPINDLE WITH A GRIP SUFFICIENT TO MINIMIZE LEAKAGE AT LOW PRESSURE BUT NOT SO GREAT AS TO PREVENT THE SPINDLE FROM ROTATING IN RELATION TO THE RIB, MEANS SEALING THE OUTER MARGIN OF THE DIAPHRAGM TO THE CASING, THE DIAPHRAGM BEING MOUNTED WITH THE CONVEXITY DUE TO ITS DISHED FROM TOWARD THE LOW PRESSURE SIDE OF THE SEAL, AND SUPPORTING MEANS IN THE CASING HAVING A SUPPORTING SURFACE AND SUPPORTING THE DIAPHRAGM ON THE LOW PRESSURE SIDE, THE SUPPORTING SURFACE HAVING SUB-
Claim 2
Dependent Claim
164 words
A SEAL FOR SEALING AGAINST FLUID PRESSURE A SPINDLE TO A CASING IN RELATION TO WHICH IT MAKES A ROTATIONAL MOVEMENT ABOUT ITS AXIS, COMPRISING A CENTRALLY APERTURED ELASTIC AND FLEXIBLE DIAPHRAGM INCORPORATING A RIB AROUND THE EDGE OF ITS CENTRAL APERTURE, THE DIAPHRAGM IN ITS FREE CONDITION BEING SUBSTANTIALLY DISHED WITH A SLIGHT REVERSE CURVATURE IN THE ZONE WHICH RUNS INTO THE RIB, THE DIAMETER OF THE APERTURE BEING SLIGHTLY LESS THAN THAT OF THE SPINDLE WHEREBY THE RIB ENGAGES THE SPINDLE WITH A GRIP SUFFICIENT TO MINIMIZE LEAKAGE AT LOW PRESSURE BUT NOT SO GREAT AS TO PREVENT THE SPINDLE FROM ROTATING IN RELATION TO THE RIB, MEANS SEALING THE OUTER MARGIN OF THE DIAPHRAGM TO THE CASING, THE DIAPHRAGM BEING MOUNTED WITH THE CONVEXITY DUE TO ITS DISHED FROM TOWARD THE LOW PRESSURE SIDE OF THE SEAL, AND SUPPORTING MEANS IN THE CASING HAVING A SUPPORTING SURFACE AND SUPPORTING THE DIAPHRAGM ON THE LOW PRESSURE SIDE, THE SUPPORTING SURFACE HAVING SUB-
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |