US3284089A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal for a valve operator
Assignee: MILLER PRINTING MACHINERY Co
•
Filing: 1963-05-06
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Granted: 1966-11-08
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Expires: 1983-05-06
Abstract
No abstract record available.
Inventors
- 👤 Edward N Wrenshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:08
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; F16K41/023; F16J; F16J15/00; F16J15/16; F16J15/18; F16J15/20; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A SEAL FOR A VALVE OPERATOR COMPRISING A CASING, A STEM ROTATABLY MOUNTED ON AND EXTENDING INTO THE CASING AND PACKING ABOUT THE STEM SEALING THE STEM TO THE CASING, THE PACKING COMPRISING FLEXIBLE PACKING AND A RIGID MEMBER WITH AN INTERNAL O RING IN SEALING ENGAGEMENT WITH THE STEM AND AN EXTERNAL O RING IN SEALING ENGAGEMENT MENT WITH THE CASING, THE O RINGS EFFECTIVELY SEALING THE STEM TO THE CASING AGAINST LOW PRESSURE LEAKAGE, THE FLEXIBLE PACKING BEING DISPOSED INWARDLY OF THE O RINGS INHIBITING HIGH PRESSURE LEAKAGE AND PROTECTING THE O RINGS AGAINST DETERIORATION BY GAS SO HOT THAT IT WOULD BAKE OUT THE O RINGS WITHOUT THE INTERPOSITION OF THE FLEXIBLE PACKING.
Claim 2
Dependent Claim
116 words
A SEAL FOR A VALVE OPERATOR COMPRISING A CASING, A STEM ROTATABLY MOUNTED ON AND EXTENDING INTO THE CASING AND PACKING ABOUT THE STEM SEALING THE STEM TO THE CASING, THE PACKING COMPRISING FLEXIBLE PACKING AND A RIGID MEMBER WITH AN INTERNAL O RING IN SEALING ENGAGEMENT WITH THE STEM AND AN EXTERNAL O RING IN SEALING ENGAGEMENT MENT WITH THE CASING, THE O RINGS EFFECTIVELY SEALING THE STEM TO THE CASING AGAINST LOW PRESSURE LEAKAGE, THE FLEXIBLE PACKING BEING DISPOSED INWARDLY OF THE O RINGS INHIBITING HIGH PRESSURE LEAKAGE AND PROTECTING THE O RINGS AGAINST DETERIORATION BY GAS SO HOT THAT IT WOULD BAKE OUT THE O RINGS WITHOUT THE INTERPOSITION OF THE FLEXIBLE PACKING.
References Cited (Backward Citations)
US1106933A
Cited
US2278721A
Cited
US2744775A
Cited
US3096070A
Cited
US3048362A
Cited
US3192942A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-11-07 | 1970-05-09 | 1970-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-07 | 1974-05-09 | 1974-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-07 | 1978-05-09 | 1978-11-08 | $7700.00 | Window Closed / Lapsed |