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US3556475A
Expired / Lapsed
US
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Shutoff valve
Assignee: BW IP International Inc
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Filing: 1968-05-22
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Granted: 1971-01-19
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Expires: 1988-05-22
Abstract
Abstract A shutoff valve for a fluid flow conduit which includes a pivotally supported valve closure element. The closure element includes a peripheral groove within which is disposed a sealing ring including a primary sealing surface adapted to engage the conduit bore. The ring is sized to allow radial movement with respect to the closure element and includes a secondary sealing surface biased into sealing engagement with a complementary secondary sealing surface disposed within the peripheral groove of the closure element.
Inventors
- 👤 Charles C Olenik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:03
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22; F16K1/226; F16K1/2261
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
126 words
A butterfly-type shutoff valve comprising; a fluid flow conduit, a valve-closure element pivotally supported in said conduit and movable between open and closed positions, said closure element having a groove formed about the outer periphery thereof, said groove defining a radially disposed generally annular secondary sealing surface, an annular sealing ring disposed in said groove including a primary sealing surface for engagement with said conduit, and a generally annular secondary sealing surface, biasing means disposed in said groove in engagement with said annular sealing ring effective to keep the secondary sealing surface of said sealing ring in engagement with the secondary sealing surface of said groove and effective to allow for radially inward and radially outward movement of said sealing ring with respect to said groove.
Claim 2
Dependent Claim
126 words
A butterfly-type shutoff valve comprising; a fluid flow conduit, a valve-closure element pivotally supported in said conduit and movable between open and closed positions, said closure element having a groove formed about the outer periphery thereof, said groove defining a radially disposed generally annular secondary sealing surface, an annular sealing ring disposed in said groove including a primary sealing surface for engagement with said conduit, and a generally annular secondary sealing surface, biasing means disposed in said groove in engagement with said annular sealing ring effective to keep the secondary sealing surface of said sealing ring in engagement with the secondary sealing surface of said groove and effective to allow for radially inward and radially outward movement of said sealing ring with respect to said groove.
Claim 3
Dependent Claim
49 words
A butterfly-type shutoff valve as claimed in claim 1 wherein said sealing ring has an outside diameter greater than the inside diameter of said conduit to allow radial deformation thereof within said groove when said closure element is moved to said closed position to accommodate irregularities in said conduit.
Claim 4
Dependent Claim
62 words
A butterfly-type shutoff valve as claimed in claim 2 wherein said groove is defined by means including a pair of spaced apart annular, generally radial surfaces, one of said surfaces further defining said secondary sealing surface associated with said groove, said secondary sealing surface of said sealing ring being generally radially directed complementary to said secondary sealiNg surface associated with said groove.
Claim 5
Dependent Claim
81 words
A butterfly-type shutoff valve as claimed in claim 1 wherein said valve-closure element includes a pair of complementary element sections fastened together to form said element, said peripheral groove being partially formed in each said element section by means including a generally axially extending cylindrical surface, and an annular shear ring disposed within said groove including a generally cylindrical surface disposed in intimate contact with at least a portion of said axially extending cylindrical surface formed by each said element section.
Claim 6
Dependent Claim
29 words
A butterfly-type shutoff valve as claimed in claim 4 wherein said shear ring includes a generally radially directed annular surface defining said secondary sealing surface associated with said groove.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |