US3307574A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drain structure for venting leaked fluid from valve stem packing
Assignee: ACF Industries Inc
•
Filing: 1964-02-07
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Granted: 1967-03-07
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Expires: 1984-02-07
Abstract
No abstract record available.
Inventors
- 👤 Clifford E Anderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:16
CPC Classifications
F; F16; F16K; F16K41/00; F16K41/02; E; E21; E21B; E21B43/00; E21B43/01; F16J; F16J15/00; F16J15/002; F16J15/004; F16K31/00; F16K31/12; F16K31/122; Y; Y10; Y10T; Y10T137/00; Y10T137/5762
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A VALVE FOR USE IN A CORROSIVE ENVIRONMENT, SAID VALVE COMPRISING A VALVE BODY FORMED WITH A VALVE CHAMBER THEREIN, A VALVE MEMBER POSITIONED FOR RECIPROCAL MOVEMENT WITHIN THE VALVE CHAMBER, A STEM EXTENDING THROUGH SAID BODY FOR OPENING AND CLOSING SAID VALVE MEMBER, A STEM OPERATOR HAVING A BASE PORTION THEREOF FIXED TO SAID VALVE BODY, SEALING MEANS FOR NORMALLY PREVENTING THE FLOW OF FLUID BETWEEN SAID VALVE BODY AND SAID STEM OPERATOR, DRAIN MEANS INCLUDING A CHECK VALVE FOR TRANSPORTING FLUID FROM SAID SEALING MEANS TO THE EXTERIOR OF SAID VALVE UPON FAILURE OF SAID SEALING MEANS, MEANS FOR SEALING SAID CHECK VALVE FROM CONTACT WITH SAID CORROSIVE ENVIRONMENT PRIOR TO FAILURE OF SAID SEALING MEANS.
Claim 2
Dependent Claim
118 words
A VALVE FOR USE IN A CORROSIVE ENVIRONMENT, SAID VALVE COMPRISING A VALVE BODY FORMED WITH A VALVE CHAMBER THEREIN, A VALVE MEMBER POSITIONED FOR RECIPROCAL MOVEMENT WITHIN THE VALVE CHAMBER, A STEM EXTENDING THROUGH SAID BODY FOR OPENING AND CLOSING SAID VALVE MEMBER, A STEM OPERATOR HAVING A BASE PORTION THEREOF FIXED TO SAID VALVE BODY, SEALING MEANS FOR NORMALLY PREVENTING THE FLOW OF FLUID BETWEEN SAID VALVE BODY AND SAID STEM OPERATOR, DRAIN MEANS INCLUDING A CHECK VALVE FOR TRANSPORTING FLUID FROM SAID SEALING MEANS TO THE EXTERIOR OF SAID VALVE UPON FAILURE OF SAID SEALING MEANS, MEANS FOR SEALING SAID CHECK VALVE FROM CONTACT WITH SAID CORROSIVE ENVIRONMENT PRIOR TO FAILURE OF SAID SEALING MEANS.
References Cited (Backward Citations)
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Cited
US1960724A
Cited
US2738945A
Cited
US3054617A
Cited
GB940679A
Cited
US3226078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-06 | 1970-09-05 | 1971-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-06 | 1974-09-05 | 1975-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-06 | 1978-09-05 | 1979-03-07 | $7700.00 | Window Closed / Lapsed |