Patent US3081791A successfully refreshed from Google Patents.
US3081791A
Expired / Lapsed
US
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Butterfly valve
Assignee: Individual
•
Filing: 1959-02-05
•
Granted: 1963-03-19
•
Expires: 1979-02-05
Abstract
No abstract record available.
Inventors
- 👤 Wheatley Charles
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:11
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; Y; Y10; Y10T; Y10T137/00; Y10T137/7504
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A BUTTERFLY VALVE COMPRISING A SUBSTANTIALLY CYLINDRICAL BODY, A CLOSURE MEMBER PIVOTALLY SECURED WITHIN THE BODY, MEANS FOR PIVOTING THE CLOSURE MEMBER TO PROVIDE ALTERNATE POSITIONS OF OPEN AND CLOSED FOR THE VALVE, A SEATING MEMBER SLIDABLY DISPOSED WITHIN THE BODY PORTION SPACED FROM THE PIVOT OF THE CLOSURE MEMBER FOR INDEPENDENT REMOVAL FROM THE VALVE BODY, SEALING MEANS INTERPOSED BETWEEN THE SEATING MEMBER AND THE BODY, RESILIENT SEALING MEANS PROVIDED ON THE CLOSURE MEMBER FOR COOPERATING WITH THE SEATING PORTION TO PRECLUDE LEADKAGE OF FLUID THEREBETWEEN IN THE CLOSED POSITION FOR THE CLOSURE MEMBER, AND A PLATE MEMBER REMOVABLY SECURED TO THE CLOSURE MEMBER FOR RETAINING THE SEALING MEANS THEREON AND PROVIDING FOR INDEPENDENT REMOVAL OF THE SEALING MEANS THEREFROM UPON REMOVAL OF THE SEATING MEMBER.
Claim 2
Dependent Claim
127 words
A BUTTERFLY VALVE COMPRISING A SUBSTANTIALLY CYLINDRICAL BODY, A CLOSURE MEMBER PIVOTALLY SECURED WITHIN THE BODY, MEANS FOR PIVOTING THE CLOSURE MEMBER TO PROVIDE ALTERNATE POSITIONS OF OPEN AND CLOSED FOR THE VALVE, A SEATING MEMBER SLIDABLY DISPOSED WITHIN THE BODY PORTION SPACED FROM THE PIVOT OF THE CLOSURE MEMBER FOR INDEPENDENT REMOVAL FROM THE VALVE BODY, SEALING MEANS INTERPOSED BETWEEN THE SEATING MEMBER AND THE BODY, RESILIENT SEALING MEANS PROVIDED ON THE CLOSURE MEMBER FOR COOPERATING WITH THE SEATING PORTION TO PRECLUDE LEADKAGE OF FLUID THEREBETWEEN IN THE CLOSED POSITION FOR THE CLOSURE MEMBER, AND A PLATE MEMBER REMOVABLY SECURED TO THE CLOSURE MEMBER FOR RETAINING THE SEALING MEANS THEREON AND PROVIDING FOR INDEPENDENT REMOVAL OF THE SEALING MEANS THEREFROM UPON REMOVAL OF THE SEATING MEMBER.
References Cited (Backward Citations)
BE552878A
Cited
US2339666A
Cited
GB245650A
Cited
US2302695A
Cited
US2438672A
Cited
GB689630A
Cited
US2730119A
Cited
US2740423A
Cited
US2840338A
Cited
US2883149A
Cited
US2912218A
Cited
US2853267A
Cited
US2820605A
Cited
US2936153A
Cited
US2886284A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-18 | 1966-09-17 | 1967-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-18 | 1970-09-17 | 1971-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-18 | 1974-09-17 | 1975-03-19 | $7700.00 | Window Closed / Lapsed |