US3287971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter
Assignee: Weatherhead Co
•
Filing: 1964-06-10
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Granted: 1966-11-29
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Expires: 1984-06-10
Abstract
No abstract record available.
Inventors
- 👤 Bahniuk Eugene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:30
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/20; G01F1/22; G01F1/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A FLOWMETER FOR MEASURING THE RATE OF FLUID FLOW COMPRISING A BODY HAVING AN INLET AND AN OUTLET, A PASSAGE EXTENDING BETWEEN SAID INLET AND SAID OUTLET, A VALVE SEAT IN SAID PASSAGE, A VALVE MEMBER ADAPTED TO MOVE TO AND FROM SAID SEAT TO PROVIDE A VARIABLE AREA ORIFICE BETWEEN SAID SEAT AND SAID VALVE MEMBER, A CANTILEVER SPRING MOUNTED IN SAID BODY HAVING A HIGH PRELOAD TO BIAS SAID VALVE MEMBER TOWARD SAID SEAT AND HAVING A SPRING RATE TO MAINTAIN THE BIASING FORCE SUBSTANTIALLY CONSTANT OVER THE RANGE OF MOVEMENT OF SAID VALVE MEMBER, AND SENSING MEANS RESPONSIVE TO DEFLECTION OF SAID CANTILEVER SPRING ADAPTED TO INDICATE THE POSITION OF SAID VALVE MEM-
Claim 2
Dependent Claim
116 words
A FLOWMETER FOR MEASURING THE RATE OF FLUID FLOW COMPRISING A BODY HAVING AN INLET AND AN OUTLET, A PASSAGE EXTENDING BETWEEN SAID INLET AND SAID OUTLET, A VALVE SEAT IN SAID PASSAGE, A VALVE MEMBER ADAPTED TO MOVE TO AND FROM SAID SEAT TO PROVIDE A VARIABLE AREA ORIFICE BETWEEN SAID SEAT AND SAID VALVE MEMBER, A CANTILEVER SPRING MOUNTED IN SAID BODY HAVING A HIGH PRELOAD TO BIAS SAID VALVE MEMBER TOWARD SAID SEAT AND HAVING A SPRING RATE TO MAINTAIN THE BIASING FORCE SUBSTANTIALLY CONSTANT OVER THE RANGE OF MOVEMENT OF SAID VALVE MEMBER, AND SENSING MEANS RESPONSIVE TO DEFLECTION OF SAID CANTILEVER SPRING ADAPTED TO INDICATE THE POSITION OF SAID VALVE MEM-
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) | 1969-11-28 | 1970-05-30 | 1970-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-11-28 | 1974-05-30 | 1974-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-11-28 | 1978-05-30 | 1978-11-29 | $7700.00 | Window Closed / Lapsed |