Patent US1680668A successfully refreshed from Google Patents.
US3357680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Butterfly valve disk
Assignee: Crane Co
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Filing: 1965-04-02
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Granted: 1967-12-12
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Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 Hubert L Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:15
CPC Classifications
F; F16; F16K; F16K1/00; F16K1/16; F16K1/18; F16K1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
IN A BUTTERFLY VALVE HAVING A RESILIENT SEAT IN THE VALVE BODY: A BUTTERFLY VALVE DISK ADAPTED TO FORM A CLOSURE MEMBER IN SAID VALVE WITH SAID RESILIENT SEAT, SAID DISK HAVING AN ANNULAR PERIPHERAL CLOSURE EDGE SURFACE, EACH EDGE SURFACE INCLUDING BEVEL SURFACES AT EACH SIDE OF SAID DISK, EACH SAID BEVEL SURFACE DEFINING A SINGLE GEOMETRIC SURFACE OF REVOLUTION, A PAIR OF OPPOSITELY SPACED ROTATIONAL BEARING SURFACES ON SAID EDGE SURFACE ENCLOSED WITHIN SAID GEOMETRIC SURFACES OF REVOLUTION, SAID BEARING SURFACES TRUNCATING SAID EDGE SURFACE, EACH SAID BEVEL SURFACE ENCIRCLING ONE SIDE OF EACH OF SAID BEARING SURFACES, AND EACH SAID BEVEL SURFACE BEING A SINGLE CONTINUOUS UNINTERRUPTED SURFACE ALL ON SAID SINGLE GEOMETRIC SURFACE OF REVOLUTION.
Claim 2
Dependent Claim
119 words
IN A BUTTERFLY VALVE HAVING A RESILIENT SEAT IN THE VALVE BODY: A BUTTERFLY VALVE DISK ADAPTED TO FORM A CLOSURE MEMBER IN SAID VALVE WITH SAID RESILIENT SEAT, SAID DISK HAVING AN ANNULAR PERIPHERAL CLOSURE EDGE SURFACE, EACH EDGE SURFACE INCLUDING BEVEL SURFACES AT EACH SIDE OF SAID DISK, EACH SAID BEVEL SURFACE DEFINING A SINGLE GEOMETRIC SURFACE OF REVOLUTION, A PAIR OF OPPOSITELY SPACED ROTATIONAL BEARING SURFACES ON SAID EDGE SURFACE ENCLOSED WITHIN SAID GEOMETRIC SURFACES OF REVOLUTION, SAID BEARING SURFACES TRUNCATING SAID EDGE SURFACE, EACH SAID BEVEL SURFACE ENCIRCLING ONE SIDE OF EACH OF SAID BEARING SURFACES, AND EACH SAID BEVEL SURFACE BEING A SINGLE CONTINUOUS UNINTERRUPTED SURFACE ALL ON SAID SINGLE GEOMETRIC SURFACE OF REVOLUTION.
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) | 1970-12-11 | 1971-06-12 | 1971-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-11 | 1975-06-12 | 1975-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-11 | 1979-06-12 | 1979-12-12 | $7700.00 | Window Closed / Lapsed |