US3331388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control system and fluid flow transducer therefor
Assignee: Caterpillar Inc
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Filing: 1965-05-04
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Granted: 1967-07-18
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Expires: 1985-05-04
Abstract
No abstract record available.
Inventors
- 👤 Duane E Evans
- 👤 Lloyd E Johnson
- 👤 William E Streight
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:22
CPC Classifications
G; G05; G05D; G05D7/00; G05D7/06; G05D7/0617; G05D7/0629; G05D7/0635; F; F02; F02D; F02D29/00; H; H02; H02P; H02P23/00; H02P23/16; F02D2700/00; F02D2700/07; Y; Y10; Y10T; Y10T137/00; Y10T137/7722; Y10T137/7758; Y10T137/7759
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A TRANSDUCER FOR PROVIDING AN ELECTRICAL SIGNAL AS A FUNCTION OF FLUID FLOW THROUGH A FLUID OPENING, COMPRISING IN COMBINATION; A LEAF SPRING HAVING ONE END FIXED AGAINST MOVEMENT IN ANY DIRECTION AND ONE FREE END; VALVE MEANS ASSOCIATED WITH THE FREE END OF SAID SPRING AND THE FLUID OPENING WHEREBY SAID SPRING IS STRAINED IN RESPONSE TO FLOW THROUGH THE FLUID OPENING; AND STRAIN GAGE MEANS SECURED TO SAID SPRING WHEREBY DEFLECTION OF SAID SPRING OPERATES TO CHANGE THE ELECTRICAL CHARACTERISTICS OF SAID GAGE MEANS.
Claim 2
Dependent Claim
86 words
A TRANSDUCER FOR PROVIDING AN ELECTRICAL SIGNAL AS A FUNCTION OF FLUID FLOW THROUGH A FLUID OPENING, COMPRISING IN COMBINATION; A LEAF SPRING HAVING ONE END FIXED AGAINST MOVEMENT IN ANY DIRECTION AND ONE FREE END; VALVE MEANS ASSOCIATED WITH THE FREE END OF SAID SPRING AND THE FLUID OPENING WHEREBY SAID SPRING IS STRAINED IN RESPONSE TO FLOW THROUGH THE FLUID OPENING; AND STRAIN GAGE MEANS SECURED TO SAID SPRING WHEREBY DEFLECTION OF SAID SPRING OPERATES TO CHANGE THE ELECTRICAL CHARACTERISTICS OF SAID GAGE MEANS.
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) | 1970-07-17 | 1971-01-16 | 1971-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-17 | 1975-01-16 | 1975-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-17 | 1979-01-16 | 1979-07-18 | $7700.00 | Window Closed / Lapsed |