Patent US20050004583A1 successfully refreshed from Google Patents.
US3316762A
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Apparatus and process for measuring fluid flow
Assignee: Statham Instruments Inc
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Filing: 1963-08-28
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Granted: 1967-05-02
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Expires: 1983-08-28
Abstract
No abstract record available.
Inventors
- 👤 Allan S Westersten
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:22
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/02; A61B5/026; A61B5/0265; G; G01; G01F; G01F1/00; G01F1/56; G01F1/58; A61B5/72; A61B5/7235; A61B5/7239
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
158 words
IN APPARATUS FOR MEASURING FLUID FLOW, SAID APPARATUS HAVING SENSING MEANS FOR SENSING AN ELECTRICAL QUANTITY WHICH IS A FUNCTION OF THE FLUID FLOW, AND ENERGIZING MEANS FOR CREATING A FIELD WHICH, IN CONJUNCTION WITH SAID FLOW, CREATES SAID ELECTRICAL QUANTITY, THE COMBINATION COMPRISING: FIRST TIME SAMPLING MEANS FOR SAMPLING SAID ELECTRICAL QUANTITY AT PREDETERMINED FIRST INTERVALS AND DELIVERING AN OUTPUT WHICH IS A COMPOSITE OF BOTH A FLOW SIGNAL THAT IS A FUNCTION OF SAID FLOW AND AN UNWANTED ERROR SIGNAL; SECOND TIME SAMPLING MEANS FOR SAMPLING SAID ELECTRICAL QUANTITY AT PREDETERMINED INTERVALS DIFFERING FROM SAID FIRST INTERVALS AND DELIVERING A SIGNAL WHICH IS A FUNCTION SUBSTANTIALLY ONLY OF SAID UNWANTED ERROR SIGNAL; MEANS FOR ALGEBRAICALLY COMBINING THE OUTPUTS OF SAID TIME SAMPLING MEANS TO DERIVE A SIGNAL WHICH IS A FUNCTION OF THE FLUID FLOW FREE OF THE UNWANTED ERROR SIGNAL, AND MEANS FOR MEASURING SAID DERIVED SIGNAL, THEREBY TO OBTAIN A MEASURE OF SAID FLOW.
Claim 2
Dependent Claim
158 words
IN APPARATUS FOR MEASURING FLUID FLOW, SAID APPARATUS HAVING SENSING MEANS FOR SENSING AN ELECTRICAL QUANTITY WHICH IS A FUNCTION OF THE FLUID FLOW, AND ENERGIZING MEANS FOR CREATING A FIELD WHICH, IN CONJUNCTION WITH SAID FLOW, CREATES SAID ELECTRICAL QUANTITY, THE COMBINATION COMPRISING: FIRST TIME SAMPLING MEANS FOR SAMPLING SAID ELECTRICAL QUANTITY AT PREDETERMINED FIRST INTERVALS AND DELIVERING AN OUTPUT WHICH IS A COMPOSITE OF BOTH A FLOW SIGNAL THAT IS A FUNCTION OF SAID FLOW AND AN UNWANTED ERROR SIGNAL; SECOND TIME SAMPLING MEANS FOR SAMPLING SAID ELECTRICAL QUANTITY AT PREDETERMINED INTERVALS DIFFERING FROM SAID FIRST INTERVALS AND DELIVERING A SIGNAL WHICH IS A FUNCTION SUBSTANTIALLY ONLY OF SAID UNWANTED ERROR SIGNAL; MEANS FOR ALGEBRAICALLY COMBINING THE OUTPUTS OF SAID TIME SAMPLING MEANS TO DERIVE A SIGNAL WHICH IS A FUNCTION OF THE FLUID FLOW FREE OF THE UNWANTED ERROR SIGNAL, AND MEANS FOR MEASURING SAID DERIVED SIGNAL, THEREBY TO OBTAIN A MEASURE OF SAID FLOW.
Claim 3
Dependent Claim
87 words
PROCESS FOR THE MEASUREMENT OF FLUID FLOW COMPRISING: CREATING A SINGLE SIGNAL WHICH IS A FUNCTION OF SAID FLOW AND ALSO OF AN ERROR; DERIVING FROM SAID SINGLE SIGNAL A SECOND SIGNAL WHICH IS A FUNCTION OF SAID FLOW AND OF SAID ERROR; DERIVING FROM SAID SINGLE SIGNAL A THIRD SIGNAL WHICH IS A FUNCTION ONLY OF SAID ERROR; COMBINING SAID SECOND AND THIRD SIGNALS TO PRODUCE A FOURTH SIGNAL WHICH IS A FUNCTION OF SAID FLOW SUBSTANTIALLY FREE OF SAID ERROR; AND MEASURING SAID FOURTH SIGNAL.
Claim 4
Dependent Claim
87 words
PROCESS FOR THE MEASUREMENT OF FLUID FLOW COMPRISING: CREATING A SINGLE SIGNAL WHICH IS A FUNCTION OF SAID FLOW AND ALSO OF AN ERROR; DERIVING FROM SAID SINGLE SIGNAL A SECOND SIGNAL WHICH IS A FUNCTION OF SAID FLOW AND OF SAID ERROR; DERIVING FROM SAID SINGLE SIGNAL A THIRD SIGNAL WHICH IS A FUNCTION ONLY OF SAID ERROR; COMBINING SAID SECOND AND THIRD SIGNALS TO PRODUCE A FOURTH SIGNAL WHICH IS A FUNCTION OF SAID FLOW SUBSTANTIALLY FREE OF SAID ERROR; AND MEASURING SAID FOURTH SIGNAL.
References Cited (Backward Citations)
US2607223A
Cited
US3161047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |